Any faith that cannot adapt to reality is merely an illusion.
Belief can never go against a concept of reality. Because reality is active and unequivocal, but belief is something constructed and variable. When belief goes against reality, the logical principle is that the belief is wrong.
To do this, it is necessary to have a careful analysis of what is reality. For example, poison has the characteristic of killing, and killing is destroying life, therefore, any belief contrary to this is a mistake. One cannot have a belief that is linked to something destructive. For it is merely a destructive belief.
The rules of logic work the same way. If I say that 1 is one, then 1 cannot be 3, because it completely violates the logic of things. A stone cannot be 3 stones, otherwise the principle multiplied by all other concepts generates complete irrationality.
How would this be, if I observe the mathematical function of the law of gravity, and observe that we have the Force, equal interaction between two bodies, then if I consider that 1 body is 3 bodies, and vice versa, the entire law of gravity from this concept, would be flawed. In this principle, one could not launch satellites into space, one could not even make calculations for the flight of airplanes.
Thus, every faith contrary to reality merely has a destructive factor for those who accept that belief.
