“If God did speak plainly, and answer prayers reliably, God would just become one more boringly real thing, no more worth believing in than the postman. If God were real, it would destroy the inner uncertainty that brings forth outward fervor in compensation. And if everyone else believed God were real, it would destroy the specialness of being one of the elect.” (Eliezer Yudkowsky, Rationality)

Why belief in God is special because of uncertainty and not everyone believing.