Do you believe in God? -- I believe. Why do you believe this? - I believe ordinary people, I must believe something, otherwise I can not sustenance, and then fall into the abyss, never stop, go on.
Probably you don't so much believe in God as you to move forward you need to have someone you managed. After all, if you get to the end, then you forward is not God, and preachers. And they are people just like you.
Nihilism in my opinion is the abyss.
http://www.arasite.org/WL3/nietnihil.html#_ftn1It (nihilism) is the continued destruction of all meaning and signification. It is the belief that nothing really matters any more, because nothing really has any meaning. We have no system of beliefs or values which could orientate us. The old systems of belief, like religion and morality, still exist, but at best we only follow them half-heartedly, and at worst, think that they have no meaning whatsoever. They exist only the edges of our lives and consciousnesses. But it isn’t just the world that doesn’t have any meaning anymore. We ourselves don’t have any meaning to ourselves. Why should we choice one course of action over the other? What does it really matter anymore, since no-one’s individual life really has any significance in the grand scheme of things...
Nothing is worth much anymore, everything comes down to the same thing, everything is equalized. Everything is the same and equivalent: the true and the false, the good and the bad. Everything is outdated, used up, old dilapidated, dying: an undefined agony of meaning, an unending twilight: not a definite annihilation of significations, but their indefinite collapse.