Dr. William Lane Craig is a Christian philosopher of the highest caliber.[i] He has multiple doctorate degrees and has taught at various colleges and universities. He is a prolific writer, and has debated nearly two dozen of the more outspoken atheists, agnostics and skeptical thinkers of the world on philosophical, theological and other issues.
In the short clip below, which is a segment from a longer interview on the various arguments (proofs) for the existence of God, he discusses an additional basis for knowing that God exists apart from rational bases for believing in God. This basis, or claim for the existence of God, is personal experience.
This is not an argument for the existence of God. It isn’t rational proof. Rather, it is more like a personal proof or confirmation of the existence of God apart from (not contrary to) reason. It isn’t a substitute for reason, but neither is reason a substitute for the experience.
The main ways that Dr. Craig (and most theists) usually discusses the proof of the existence of God is logic, scientific evidence and philosophy, but these aren’t the only proofs we have.
We might be apt in the western world to discount personal experience and to be suspicious of it, and for good reason. Charles Darwin was suspicious of his own intuition, being the product of evolution from lower life-forms.[ii] A good friend of his got lost in the morass of spiritualism, and that experience of seeing his friend get lost down the rabbit holes of irrational, spiritualistic notions influenced Darwin to distrust his own intuitions.