UC San Diego astrophysicist Brian Keating has an interesting if a bit fast-moving seven and a half minute video up on YouTube that compares belief in the multiverse to religious belief. The video explains the use of the concept of falsifiability in scientific theorizing and is very helpful, except for an error he appears to make in his introductory remarks.
Keating adopts for the sake of discussion the stereotype of belief in God as a belief based on the lack of evidence, which of course is indeed the stereotype but which is wildly mistaken. But he then seems to suggest that evidence for God and faith in God are somehow inversely related to each other as though faith in God's existence decreases as evidence for God's existence increases.
This assumes the Dawkinsian definition of faith, i.e. "belief without evidence," but that definition is quite wrong. It's actually the definition of "blind" faith, but that's not what's meant when thoughtful people talk about faith in God.
Faith is not belief without evidence but rather belief without proof, which is, of course, not the same thing. Indeed, the more evidence one has for any proposition the stronger one's faith in the truth of that proposition generally is, even if one can't prove that it's true.
For example, the more evidence you have that your surgeon has in the past successfully performed operations similar to the one you're planning to have, the more faith you have that he will satisfactorily perform the surgery on you. The more evidence you have that an airline pilot has proven proficient in the past the stronger is your faith that he'll fly you successfully to your destination today.
So far from being somehow contrary to faith, evidence actually strengthens faith. The more evidence there is that God exists, and there's actually a great deal, the more robust one's trust in Him and commitment to Him tends to be. And trust and commitment are two essential components of what people mean when they talk about faith in God.
We might express this as a series of entailments where each entailment in the series is "packed into" the one before it:
Faith in God ---> Belief despite the lack of proof that God exists ---> Love for, and trust in, God ---> Commitment to live the kind of life God desires ---> Treating others with compassion and justice.
Thus, when someone says they have faith that God exists they're actually saying, or should be saying, everything that's entailed by that proposition.
Anyway, here's Keating on the multiverse, evidence, faith and falsifiability:
