An English proverb says that “the eyes are the window to the soul”, while a similar Greek proverb goes “the face is the mirror of the soul”.
In any case the face is extremely important; not just the face of a person but of a building as well. It definitely tells you something (if not a lot) about the essence and the character of that place.
And if a building is a place of worship then you would expect the face (or facade) to tell you at least something of the faith that is professed by the people worshiping there. In time this will become very obvious.