I am no atheist. Atheism is a belief just like religion. You cannot prove that god exists, but you cannot prove that god does not exist either.
So I consider myself an agnost. I don't know. I put my faith in what we do know. Science.
I am an a - theist.
One who is without theism.
Theism is a belief in god/gods.
I am an atheist, someone who lacks belief in gods/god.
This doesn't mean that I can't think of gods/god as
possible, only that faith isn't part of my calculation. As per my current understanding of science and the world, the possibility is vanishingly small. But with the right evidence (and it would need to convincingly explain
a lot) I'd adjust my worldview.
Atheism does not seek 'to prove that god does not exist.' It doesn't actively push any agenda, really. It just kinda cuts faith out of the equation.
Agnostics believe that we can never prove/disprove the existence of god/gods. Though, granted, each agnostic seems to have a slightly different definition. It doesn't concern itself with what you put into the equation, it's only concerned with the end answer - whether there is or is not some form of divinity.
Edit: To attempt further clarification:
It's possible to be an Agnostic Christian - someone who
believes in God, but doesn't think we can ever
know one way or another whether he exists.
It is possible to be an Agnostic Atheist - someone who doesn't
believe in god/gods, and also thinks we can never
know whether they exist.
It is not possible to be an Atheistic Christian - someone who doesn't
believe in God and
believes in God.
((Some may prefer to replace 'Christian' with 'theist' in the above. I'm just playing to the crowd
))
EditEdit: Apparently this discussion moved over to the Railgun thread, so... oops?