There is no proof that God exists.
Some of my religious friends may be surprised or offended by this statement, but it is true. The existence of God simply has not been proven in any scientifically valid way. Many have made valiant and thought-provoking efforts at ‘proofs’ of God’s existence, most notably the five proofs (Quinque viae) of St. Thomas Aquinas, and these are worthy of serious study and contemplation. They do not, however, withstand serious scientific scrutiny because they cannot be tested in any meaningful way.
‘So why,’ asks the non-believer, ‘does a college-educated, well-read, scientific-minded guy like yourself believe in God?’ My answer is simple. Science has not disproved God either, nor could it (yes, I know all about the scientific method and null hypothesis). My faith does not need or demand scientific proof; it is rooted not in science, but in natural law and my human instincts, emotions, and reason. I don’t need scientific proof of God’s existence to believe in God any more than I need scientific proof of love’s existence to believe in love. Science tells me many things about the universe; it does not, however, tell me much of anything useful about love. That does not mean that love doesn’t exist, or that it has no worth in our lives.
The doctrine of the theist—broadly defined here to mean ‘somebody who believes in a deity of some kind’—boils down to a logically consistent core: “I believe in God; proof is unnecessary.” One may, of course, criticize this doctrine, but you cannot argue that it is somehow inconsistent or logically invalid. It asks for no proof, so the lack of it doesn’t matter. If God’s existence were somehow proved by science, many theists would (hopefully politely) say they told you so, but that proof would still not be a bedrock necessity of their faith. Faith transcends science into the realms of natural law, instinct, emotion, and reason . . . things that cannot be quantified or measured, and yet they exist.
