Tag Archives: Apologetics

When talking with a non-Christian, make truth – not behavior – the main issue

Bible study that hits the spot
Bible study that hits the spot

Pastor Matt posted about something that I think all Christian apologists believe, deep down. (H/T The Poached Egg)

He writes:

Typically, the church has defined loving one’s neighbor as in line with Jesus’ parable of the Good Samaritan (Luke 10:25-37) and Christ’s teaching in passages such as Matthew 25:31-46, in which we are commanded to love the imprisoned, the homeless, the hungry, etc. as if they were Jesus himself. Of course all believers should do so whether by volunteering at a soup kitchen or donating money to ministries like World Help.

But there is more to loving one’s neighbor these days than caring for the poor, as important as that is.  Those of us who live in a first world western country now dwell in a post-Christian society.  Our neighbors are inundated with naturalism masquerading as good science and sound philosophy.  Non-Christians believe the faith is intellectually vacuous.

It shocks many people when those trained in apologetics point out that atheists cannot answer questions like, “How did the universe come into existence?” “Why is our planet so finely tuned for life despite all the odds against it?” “How did life begin?” “Why do humans have consciousness?” “How is there truth or right and wrong without God?” “Why did the disciples die horrible deaths as impoverished traveling peasants rather than deny the resurrection of Jesus?”, etc.

If we are to help bring our neighbors to saving faith, we must first destroy their false ideas of what Christianity is and is not.  That means we must preach the Gospel (2 Cor. 5:21), knock down specious views of the faith and present the truth of what we believe.

Apologetics is not just an intellectual exercise for nerds like me or a debate to be won on college campuses but an increasing tool in loving our neighbors.  For if they do not understand the faith, they will likely not come to faith and that is what the God we love wants and how we must show love to our neighbors.  So, let’s study not just to win arguments but to love others.

That reminds me of 2 Corinthians 10:3-5. Our job is to beat up on false ideas and speculations.

Pastor Matt’s point is critical, I think. Just stop and think for a minute about your non-believing co-workers. Do they know that the universe began to exist? Do they know that the initial conditions and the cosmological constants have to be finely tuned to support things like galaxies, stars, planets and elements heavier than hydrogen? Do they know how much information is in a protein, and how many proteins would be needed to make the first living cell? Do they know what it takes to make a planet that can support life? What facts from the gospels and the Pauline letters pass the tests for historicity? What is the best explanation of those minimal facts?

These are the facts that we share when we discuss spiritual things with people. They are not Christian facts, they are public, testable facts. And yet, almost no one in the culture who is not already a believer is curious to find out these things on their own. But without the evidence, how are they supposed to take the first step towards a relationship with God through Jesus Christ? It’s not possible. This is a propositional faith, and we know it’s true by evidence. To share the evidence with someone so they can decide is as loving as sharing the evidence about retirement planning, or the evidence about nutrition, or the evidence about fitness and exercise, or the evidence about career planning. When you love someone, you tell them the facts, and then they decide. Evangelism is the same thing.

Here’s something from a recent post by J. Warner Wallace, where he talks about doing apologetics with people who have not yet decided whether God exists or not.

The Undecided

In many ways, this group holds the most promise. People who are undecided usually fall into two categories. Some have never really given the issue much thought. They’re neither for nor against; they’ve simply been living unaware. You may be the first person to introduce them to the issues you are trying to share. If so, remember the importance of a first impression. What you say or do will have an impact on the work of those who follow you. The second group of “undecideds” are people who have given the issue some thought, but are just beginning to make their decision. For this group of people, your defense of Christianity may very well be the deciding factor. The responsibility you and I have with the undecided is daunting, but it’s a privilege to play a small part in their decision.

OK, so I want to make a point about this. So often, I see Christian parents and leaders trying to focus on changing people’s behaviors, and not by giving them evidence. Instead of trying to convince them about what’s true, they tell them Bible verses, or maybe tell them they are going to Hell. But given what Matt and J. Warner said, I don’t want us to be focused on changing outward behavior. I want us to be focused on showing people what is true and showing our work – how we arrived at these true beliefs. You are doing Christianity wrong if you focus on getting behaviors from people by shaming them, overpowering them or scaring them.

So in my case, I’m not trying to get non-Christians to act like Christians when they have no reasons to be one. I’m trying to get them to settle on true beliefs – so that each of them and God can shake hands and be reconciled, responding to his drawing them of their own free will. Then, they can decide how they are going to act. And how they act might be even better than what we had in mind for them when all we wanted was for them to quit swearing and eat their vegetables. The Christian life is bigger than just making people do what we want them to do.

Robin Collins lectures on fine-tuning for discoverability from particle physics

Christianity and the progress of science
Christianity and the progress of science

Here’s the lecture:

This lecture is 29 minutes long, the Q&A is 15 minutes. I highly recommend this lecture to all audiences of all levels of ability, for the simple reasons that apart from the content, this lecture is a how-to clinic in the tone, body language, slides and so on for you to use when trying to be persuasive when making your case. Science is king in this lecture. The scientific method is defined and applied in a winsome way. Making science understandable should be the bread and butter approach to Christian apologetics, and this lecture rivals the Mike Strauss lecture at Stanford University and the Mike Strauss lecture at the University of Texas – Dallas as the ideal lectures for showing that. It’s not just the scientific material that makes this lecture by Collins work, it’s the narrative and the style that make the lecture work.

About Robin Collins:

Robin Collins (PhD, University of Notre Dame, 1993), is professor of philosophy at Messiah College, Grantham, PA specializing in the area of science and religion.  He has written over twenty-five articles and book chapters on a wide range of topics, such as the fine-tuning of the cosmos as evidence for the existence of God, evolution and original sin, the Doctrine of Atonement, Asian religions and Christianity, and Bohm’s theory of quantum mechanics.  Some of his most recent articles/book chapters are “Philosophy of Science and Religion” in The Oxford Handbook of Science and Religion, “Divine Action and Evolution” in The Oxford Handbook of Philosophical Theology (2009)  “The Multiverse Hypothesis: A Theistic Perspective,” in Universe or Multiverse? (Cambridge University Press), and “God and the Laws of Nature,” in Theism or Naturalism: New Philosophical Perspectives (Oxford University Press, forthcoming).  He recently received a grant from the John Templeton Foundation to finish a book that presents the case for design based on physics and cosmology,  tentatively entitled The Well-Tempered Universe: God, Cosmic Fine-tuning, and the Laws of Nature.

His thesis in one slide:

Fine-tuning for discoverability
Fine-tuning for discoverability – the DLO thesis


  • Thesis: the universe is more intelligible than we would expect it by chance
  • The regular fine-tuning argument says that complex embodied observers are very rare
  • But the number of highly-discoverable universes that have complex embodied observers is rarer still
  • Why do we exist in a highly-discoverable universe?
  • Can we quantify and test discoverability?
  • Yes: by varying fundamental parameters and seeing how it affects discoverability
  • Conclusion of his calculations: The Discoverability-Liveability Optimality range is an even smaller range within the Liveablity Optimality range of the standard fine-tuning argument
  • Fine-tuning #1: the fine structure constant, governs the strength of the electro-magnetic force
  • If larger, wood-burning fire becomes impossible because fires won’t stay lit, and therefore forging metals becomes unlikely
  • If smaller, wood-burning fires won’t go out, e.g. – from lightning strikes, so that wood would be less accessible
  • Other constraints: smaller value decreases effectiveness of light microscopes, drastically lowers efficiency of transformers and motors
  • Fine-tuning #2: the cosmic microwave background radiation (CMBR), radiation left over from the Big Bang
  • humans need to discover the CMBR in order to confirm the Big Bang creation out of nothing, and it depends on baryon/pothon ratio
  • his calculations show that the actual value of CMBR is exactly at the peak for detectability by humans
  • if baryon/photon ratio larger, CMBR is less discoverable
  • if baryon/photon ratio smaller, CMBR is less discoverable
  • Fine-tuning #3: parameters related to subatomic particles are fine-tuned for their discovery and usefulness, e.g. – the bottom quark, the charm quark, the tau lepton and the Higgs Boson
  • the lifetime of the particles affects their usefulness to scientists who want to investigate the Standard Model of physics
  • decay rates of these subatomic particles are related to several of the finely-tuned parameters
  • for example, the mass of the bottom quark is finely-tuned for its discoverability by scientists
  • the tau lepton and the charm quark are similarly fine-tuned for disoverability
  • the mass of the Higgs boson is finely-tuned for discoverability and for making further discoveries
  • Conclusion: the DLO thesis is strongly confirmed – this is an even greater degree of fine-tuning that the already astonishing probabilities of the fine-tuning for complex, embodied intelligent beings
  • The formalized version of the philosophical argument based on this evidence is impervious with some of the traditional objections to the standard fine-tuning argument
  • #1 multiverse/selection effect: it is not subject to multiverse / observer selection objections
  • #2 normalizeability: it is not subject to the McGrew-Vestrup objection because the range of possible values is finite not infinite
  • #3 falsifiability: it makes falsifiable predictions, and in fact Collins’ earlier calculations of the CMBR discoverability contained an error that falsified the thesis – until he found the error and corrected for it
  • #4 usefulness: it gives clues about the Creator’s purpose for us, namely that the universe was created for us to be able to do science and find evidence of the Creator’s existence – there is no expectation for us to exercise blind faith, trust in God is meant to be a plausible deduction from the progress of experimental science

Sample slide:

Fine-tuning of the bottom quark for discoverability
Bottom quark lifetime is finely-tuned for discoverability

And another:

Higgs boson mass is finely-tuned for discoverability
Higgs boson mass is finely-tuned for discoverability

Earlier, I blogged about a Robin Collins lecture on the fine-tuning that allows complex, embodied life to exist. Another must-see lecture. If you are looking for something to study in university, and you have funding, then physics, mathematics and philosophy are the best places to be for a Christian scholar.

William Lane Craig lectures on naturalistic alternatives to the Big Bang

William Lane Craig lecturing to university students
William Lane Craig lecturing to university students

Here’s the lecture, which was given in 2004 at the University of Colorado, Boulder.

This lecture might be a little advanced for beginners, but if you stretch your mind first, you shouldn’t tear anything. (Note: standard disclaimers apply if you do tear something!)

The description of the video states:

This is quite simply one of the best lectures William Lane Craig (a philosopher of science) has given. Craig explores the origins of the universe. He argues for a beginning of the universe, while refuting scientific models like the Steady State Theory, the Oscillating Theory, Quantum Vacuum Fluctuation Model, Chaotic Inflationary Theory, Quantum Gravity Theory, String Theory, M-Theory and Cyclic Ekpyrotic Theory.

And here is the description of the lecture from Reasonable Faith:

A Templeton Foundation lecture at the University of Colorado, Boulder, laying out the case from contemporary cosmology for the beginning of the universe and its theological implications. Includes a lengthy Q & A period which features previous critics and debate opponents of Dr. Craig who were in attendance, including Michael Tooley, Victor Stenger, and Arnold Guminski.

Craig has previously debated famous atheists Stenger and Tooley previously. And they both asked him questions in the Q&A time of this lecture. Imagine – having laid out your entire case to two people who have debated you before and who know your arguments well. What did they ask Craig, and how did he respond?

The scientific evidence

The Big Bang cosmology that Dr. Craig presents is the standard model for how the universe came into being. It is a theory based on six lines of experimental evidence.

Scientific evidence:

  1. Einstein’s theory of general relativity (GTR)
  2. the red-shifting of light from distant galaxies implies an expanding universe
  3. the cosmic background radiation (which also disproves the oscillating model of the universe)
  4. the second law of thermodynamics applied to star formation theory
  5. hydrogen-helium abundance predictions
  6. radioactive element abundance predictions

It’s probably a good idea to be familiar with these if you are presenting this argument, because experimental science is a reliable way of knowing about reality.

Published research paper

This lecture by Dr. Craig is based on a research paper published in an astrophysics journal, and was delivered to an audience of students and faculty, including atheist physicist Victor Stenger and prominent atheist philosopher Michael Tooley, at the University of Colorado at Boulder.

Here’s the peer-reviewed article that the lecture is based on.

Here’s the abstract:

Both cosmology and philosophy trace their roots to the wonder felt by the ancient Greeks as they contemplated the universe. The ultimate question remains why the universe exists rather than nothing. This question led Leibniz to postulate the existence of a metaphysically necessary being, which he identified as God. Leibniz’s critics, however, disputed this identification, claiming that the space-time universe itself may be the metaphysically necessary being. The discovery during this century that the universe began to exist, however, calls into question the universe’s status as metaphysically necessary, since any necessary being must be eternal in its existence. Although various cosmogonic models claiming to avert the beginning of the universe predicted by the standard model have been and continue to be offered, no model involving an eternal universe has proved as plausible as the standard model. Unless we are to assert that the universe simply sprang into being uncaused out of nothing, we are thus led to Leibniz’s conclusion. Several objections to inferring a supernatural cause of the origin of the universe are considered and found to be unsound.

The whole text of the article is posted online here.

If you want something to post on your Twitter or Facebook that is much shorter than this lecture, then you should check out this quick 4-minute explanation of the kalam argument.

Sean McDowell explains how to make Christian apologetics into a career

Two Air Force JTACs discuss mission parameters prior to calling in CAS
Two Air Force JTACs discuss mission parameters prior to calling in CAS

Sean McDowell has managed to integrate apologetics pretty tightly with his career, and in this recent blog post, he offers some options to others who might want to follow suit.

He writes:

We live in a golden age of apologetics. There are more books, curricula, blogs, conferences, academic programs, and people interested in apologetics than ever before. As my friend (and boss) Craig Hazen says, “Apologetics is a growth industry.”

Part of the vision of our Biola M.A. Christian Apologetics program is to train apologists to be a resource for the local church. In fact, our dream is that churches would consider the need for a “Pastor or Apologetics” as important as a men’s ministry leader or a youth pastor. Until this dream becomes a reality, here’s a few ways to make a career in apologetics (If you think I have missed any, please let me know):

He has several options listed in the post:

  • Professor of Apologetics
  • Ratio Christi
  • Author
  • Blogger
  • Speaker
  • Christian School Teacher

At least one personal friend of mine does each of these six options! They are all doable, but you really have to be the best at what you do if you want to pursue them, simply because of the lower demand. People don’t value truth these days as much as they value fun and entertainment.

Let’s look at number 6 in particular, because this one seems to me to offer the most linear, low-risk, option:

6.Christian School Teacher. Before accepting a teaching position at Biola University, I taught theology and apologetics full-time at a private Christian school in southern California. Since teaching high school involves grading and disciplining students, it is very different than writing or speaking. But it is a valuable way to help Christian students think deeply about their faith, and also to critically engage non-Christian students (I had many atheist, Buddhist, and Muslim students in my classes). If you want to teach at a Christian school, you will need both apologetics/theology knowledge (an undergraduate degree or M.A. is probably sufficient) as well as training as a classroom teacher.

Of course, there is a rival view to the view of doing apologetics full time, and that view is that you should do your regular job full time, and try to have an apologetics ministry on the side. J. Warner Wallace calls such people “tent-making apologists” because, like the apostle Paul, they fund their ministry by working a normal job (Paul made tents to drive his ministry).

Air Force TACPs confirm target locations with their map
Air Force TACPs confirm target locations with their map

Wallace lists 10 reasons why tent-making apologists are effective, and this is one I have personal experience with:

Tent-Making Christian Case Makers Reach a Skeptical Audience
As an atheist, I was very skeptical of Christians when I thought they were trying to sell me something. In fact, this was a major stumbling block for me. As a high school student, I used to watch local televangelists with scorn if they repeatedly asked their viewers to send them money. Don’t underestimate this disdain on the part of skeptics. As a tent-maker, I’ve had many conversations with skeptics who have given me a hearing simply because they respected my position as a volunteer Case Maker. One told me, “At least I know you’re not in this for the money.” Tent-making Case Makers are uniquely positioned to reach a skeptical world.

This blog has no ads, because I pay wordpress to have them removed. I do post Amazon links in the What I am Reading section, but that’s only to recommend to people what I am actually reading, not to make money.

And these two are near and dear to me:

Tent-Making Christian Case Makers Thrive in Any Economy
I started thinking again about the power of tent-making Case Makers after reading Lydia McGrew’s fantastic post, “An Army of Tent Makers.” Lydia is a brilliant Case Maker who continues to have a powerful impact even though she’s not a vocational apologist. In her post, Lydia discusses the current financial climate and the limited opportunities for people seeking full-time employment as apologists. While it’s often difficult to find full-time employment in the field of Christian apologetics or start a donor-funded apologetics ministry in a challenging economy, tent-making Case Makers aren’t limited by bad economic climates. In addition, as Lydia points out, “In the end, if we can have this army of tentmakers, there will be (Lord willing) money to allow some people to work in full-time ministry. But it’s going to be quite a small proportion of those who are interested or would ideally like to do so.”

Tent Making Christian Case Makers Survive in Any Political Climate
Times are changing and our politicians and judges are less and less friendly to non-profit organizations. A federal judge recently struck down a law giving clergy tax-free housing allowances, and atheist groups continue to challenge the tax exempt status of religious non-profits.  If the non-profit status of apologetics ministries is someday successfully abolished, vocational Christian Case Makers will have to rethink their strategy. Tent-making Case Makers will already be standing in the gap. Tent-makers are flexible enough to survive, even in difficult political environments.

My regular readers know that I follow current events and what I see worries me. Earning and saving is my way of weakening the fear of the future, so that I can make a small difference today without being paralyzed by worry about tomorrow. It really is important for Christians to earn and save so that they can do ministry today without crashing and burning tomorrow when things get difficult. Although some silly people think that the height of Christian ability is to disregard the future and do wild, adventurous things today, those people are wrong.  A Christian ought to be wise about balancing ministry and finances, so that they aren’t an embarrassment to the Kingdom, or a financial burden to others. Any of the young Christians who I mentor regarding college and careers and finances will tell you that I am an absolute bully when it comes to making young people study useful subjects, get early work experience, and curtail spending on fun and thrills in favor of saving and investing.

Wallace wrote another post where he listed the occupations of a bunch of tent-making apologists, including me. I think the important thing is that you have to earn money and you have to do apologetics. Finding the right balance is your decision, but whatever you decide, make sure you are effective and make sure that you don’t starve now, or in the future when you are older. We all have to retire some day, you probably don’t want to be working full time in your 70s at a job you don’t love, just to put food on the table.

Alexander Vilenkin: “All the evidence we have says that the universe had a beginning”

I’ve decided to explain why physicists believe that there was a creation event in this post. That is to say, I’ve decided to let famous cosmologist Alexander Vilenkin do it.

From Uncommon Descent.


Did the cosmos have a beginning? The Big Bang theory seems to suggest it did, but in recent decades, cosmologists have concocted elaborate theories – for example, an eternally inflating universe or a cyclic universe – which claim to avoid the need for a beginning of the cosmos. Now it appears that the universe really had a beginning after all, even if it wasn’t necessarily the Big Bang.

At a meeting of scientists – titled “State of the Universe” – convened last week at Cambridge University to honor Stephen Hawking’s 70th birthday, cosmologist Alexander Vilenkin of Tufts University in Boston presented evidence that the universe is not eternal after all, leaving scientists at a loss to explain how the cosmos got started without a supernatural creator. The meeting was reported in New Scientist magazine (Why physicists can’t avoid a creation event, 11 January 2012).

[…]In his presentation, Professor Vilenkin discussed three theories which claim to avoid the need for a beginning of the cosmos.

The three theories are chaotic inflationary model, the oscillating model and quantum gravity model. Regular readers will know that those have all been addressed in William Lane Craig’s peer-reviewed paper that evaluates alternatives to the standard Big Bang cosmology.

But let’s see what Vilenkin said.


One popular theory is eternal inflation. Most readers will be familiar with the theory of inflation, which says that the universe increased in volume by a factor of at least 10^78 in its very early stages (from 10^−36 seconds after the Big Bang to sometime between 10^−33 and 10^−32 seconds), before settling into the slower rate of expansion that we see today. The theory of eternal inflation goes further, and holds that the universe is constantly giving birth to smaller “bubble” universes within an ever-expanding multiverse. Each bubble universe undergoes its own initial period of inflation. In some versions of the theory, the bubbles go both backwards and forwards in time, allowing the possibility of an infinite past. Trouble is, the value of one particular cosmic parameter rules out that possibility:

But in 2003, a team including Vilenkin and Guth considered what eternal inflation would mean for the Hubble constant, which describes mathematically the expansion of the universe. They found that the equations didn’t work (Physical Review Letters, DOI: 10.1103/physrevlett.90.151301). “You can’t construct a space-time with this property,” says Vilenkin. It turns out that the constant has a lower limit that prevents inflation in both time directions. “It can’t possibly be eternal in the past,” says Vilenkin. “There must be some kind of boundary.”

A second option explored by Vilenkin was that of a cyclic universe, where the universe goes through an infinite series of big bangs and crunches, with no specific beginning. It was even claimed that a cyclic universe could explain the low observed value of the cosmological constant. But as Vilenkin found, there’s a problem if you look at the disorder in the universe:

Disorder increases with time. So following each cycle, the universe must get more and more disordered. But if there has already been an infinite number of cycles, the universe we inhabit now should be in a state of maximum disorder. Such a universe would be uniformly lukewarm and featureless, and definitely lacking such complicated beings as stars, planets and physicists – nothing like the one we see around us.

One way around that is to propose that the universe just gets bigger with every cycle. Then the amount of disorder per volume doesn’t increase, so needn’t reach the maximum. But Vilenkin found that this scenario falls prey to the same mathematical argument as eternal inflation: if your universe keeps getting bigger, it must have started somewhere.

However, Vilenkin’s options were not exhausted yet. There was another possibility: that the universe had sprung from an eternal cosmic egg:

Vilenkin’s final strike is an attack on a third, lesser-known proposal that the cosmos existed eternally in a static state called the cosmic egg. This finally “cracked” to create the big bang, leading to the expanding universe we see today. Late last year Vilenkin and graduate student Audrey Mithani showed that the egg could not have existed forever after all, as quantum instabilities would force it to collapse after a finite amount of time (arxiv.org/abs/1110.4096). If it cracked instead, leading to the big bang, then this must have happened before it collapsed – and therefore also after a finite amount of time.

“This is also not a good candidate for a beginningless universe,” Vilenkin concludes.

So at the end of the day, what is Vilenkin’s verdict?

“All the evidence we have says that the universe had a beginning.”

This is consistent with the Borde-Guth-Vilenkin Theorem, which I blogged about before, and which William Lane Craig leveraged to his advantage in his debate with Peter Millican.

The Borde-Guth-Vilenkin (BGV) proof shows that every universe that expands must have a space-time boundary in the past. That means that no expanding universe, no matter what the model, can be eternal into the past. No one denies the expansion of space in our universe, and so we are left with a cosmic beginning. Even speculative alternative cosmologies do not escape the need for a beginning.


If the universe came into being out of nothing, which seems to be the case from science, then the universe has a cause. Things do not pop into being, uncaused, out of nothing. The cause of the universe must be transcendent and supernatural. It must be uncaused, because there cannot be an infinite regress of causes. It must be eternal, because it created time. It must be non-physical, because it created space. There are only two possibilities for such a cause. It could be an abstract object or an agent. Abstract objects cannot cause effects. Therefore, the cause is an agent.

Now, let’s have a discussion about this science in our churches, and see if we can’t train Christians to engage with non-Christians about the evidence so that everyone accepts what science tells us about the origin of the universe.