It's not a feeling, I got to monotheism through textual analysis and thought. Things simply are more consistent with a framework that accepts a sole mind behind it all, a Creator. I admit I could be mistaken but this is something that other people with beliefs and I could discuss, and in earnest and good faith see which is more internally consistent and fitting reality than the others, right? They can be ranked from more sensible and fitting to less, right? Because no, not everything is "equally as valid", that's some Western postmodernist nonsense that ends up with people being confused, intellectually lazy and panicky fence sitters. Tolerance doesn't mean "your nonsense is equal to my sense", it means "I won't kill you for being a commie/brown", for instance (again, neither Christianity [because the message of Jesus is buried under nonsense that people actually believe in] nor Enlightenment values helped that but whatever). My book says that "to you your system and to me mine", but I still believe mine is better, ofc, my sense is not equal to nonsense or absence.