As many times the strongest argument for theism is:
Don't expect to measure God as it is immeasurable.
Of course that would be reasonable. Can anyone measure infinity? How would you go about that without stepping outside infinity? And if you could do that, then whatever you would be measuring could not any longer be infinite, because you're outside of it.
This is why arguments to prove God as something outside ourselves, will never succeed. You can't exclude the subject. God cannot be an object and still be God.
So I find this advice very useful and would love to hear about a different kind of evidence.
Evidence of yourself. In other words in the words of one mystic I can't recall who at the moment said, "To know yourself is to know God. To know God is to know yourself." When we truly peel back the layers of the onion of who we imagine we are to find the one looking at the whole thing, then the question is answered. All that's left is finding ways to talk about it.
In this case, personal experience, or better put, personal Awareness is that evidence. You can't look outside to find God, while exclude yourself. It begins with self awareness down to the very Source itself. That's the evidence. God is the Subject of all being, the One looking out through your eyes. Think of it like trying to find your eyes while looking out through them imagining you'll find them somewhere "out there".
So, "Theism" then is simply one way to talk about the experience of that Infinite. So is atheism for that matter. Neither can define the Reality of it however, as both as putting an objective face on infinite Reality through excluding the subject, the one looking.
