What is the Bayesian theorem?

Bayesian is interactive representations of probabilistic interactions between a number of variables. They were designed to ease the presumption of independence in the Naïve Bayes and thus allow for the dependency of variables. The first example, assume I need to see whether God exists. Initially, I have to concur with some techniques to quantify it. Something like'in the event that God existed, at that point harmony, ought to be multiple times more probable than war'.