… we may have no idea why we believe what we do:
Many of the beliefs that play a fundamental role in our worldview are largely the result of the communities in which we’ve been immersed. Religious parents tend to beget religious children, liberal educational institutions tend to produce liberal graduates, blue states stay mostly blue, and red ones stay mostly red. Of course, some people, through their own sheer intelligence, might be able to see through fallacious reasoning, detect biases and, as a result, resist the social influences that lead most of us to belief. But I’m not that special, and so learning how susceptible my beliefs are to these sorts of influences makes me a bit squirmy.
Let’s work with a hypothetical example. Suppose I’m raised among atheists and firmly believe that God doesn’t exist. I realise that, had I grown up in a religious community, I would almost certainly have believed in God. Furthermore, we can imagine that, had I grown up a theist, I would have been exposed to all the considerations that I take to be relevant to the question of whether God exists: I would have learned science and history, I would have heard all the same arguments for and against the existence of God. The difference is that I would interpret this evidence differently.Miriam Schoenfield, “Why do you believe what you do? Run some diagnostics on it ” at Aeon
An alternative approach is Thomas Aquinas’s Five Ways, as explained by Michael Egnor: Arguments for God’s existence can be demonstrated by the ordinary method of scientific inference.