Nothing does not become something. Nothing creates itself. Even cold atheistic science freaks have faith, but theirs is based on much less than a Christian's. My favorite proof of God's existence is a quick test of His word.
Lets examine how.
Animals have rudimentary intelligence, so intellect can't be it, since the differences are only of degree, not of essence. What man DOES have that animals do NOT is a sense of right and wrong. Man goes instinctively to the notion of whats right and wrong, and animals do not and cannot. As proof, we do not hold animals culpable for rending each other to bits and eating each other. So God's word, which says man is like Him and animals are not like Him, is now proven right.