Without faith knowledge is not possible. Faith does not entail just the belief in god; in my opinion, faith can also refer to the ability that we have to believe in the unproven conventions and in one’s own or someone else’s rationalizations. Faith is necessary because certain knowledge of the universe is beyond the scope of man’s mind. The metaphysical and moral theories, which form the basis of all knowledge, cannot be rationally demonstrated; they have to be founded on faith (on religious or idealistic considerations). A perfect being, or god, would not need faith because he is omniscient. Man has faith because he is not omniscient.