The ego is the state of identification with and therefore the prisoner of matter, of duality, of part(s), of feelings (emotions) and the in thoughts expressed will thereof. Therefore the ego is separated from singularity which is life itself, the Whole, the True Self as being the awareness of feelings. In other words, the ego is seperated from God. Therefore the ego can only believe that there is a God. Being is being one with God. As such God is a fact. Believing is outdated. So people believe in God because they are their ego.