Theism is literally childish

[KevinM1]

Theism is a form of superstition more than mental illness, though it does feature heavily in the mental illness of religious individuals, to my knowledge.

As an outsider to religion, the line for me becomes incredibly blurred when theists start talking about their relationship with their god. Are they merely ascribing fortuitous events as a sign that their god's telling them they're on the right path? Do they actually, literally hear what they presume to be their deity?

It's just strikes me as incredibly odd. And, in any case, I find master/servant relationships troublesome.