To the bolded part, it can all be labeled a belief since I don't know the true answer and I am fine admitting I have no answer, that said I know there is no god, is this a contradiction? just like you know there is a god. But these can't logically and rationally both be true. We can both believe such, but we can't both know such. Are your going to admit that that there is a chance your wrong and there is no god Absolutely, I could very well be wrong and there may be no God. Either God exists or he does not. His existence or nonexistence would be true regardless of what anyone believes. I certainly cannot prove with the 5 senses He does, but I think there is very good evidence. Without proof, I hold my view with a certain amount of belief or faith. My faith does not change the reality that He does or does not exist (if He does, that is an absolute truth, if He does not, that would also be an absolute truth). This is why "faith" is a large and necessary component of being a Christian. or are you SURE there is a god and if that is the case would you not agree your assertion there is a god is based on beliefs instead of truth?
I dont see it as a contradiction at all....I dont know how the universe began, heck I dont even know that it had a beginning it could have just always been there in some form or another, we just have not gotten to the point that we have a reliable theory for that.....but I know it was not a god magically creating the universe.... (If God exists, magic would not be needed. So for clarification, you can't buy the idea that a designer and creator could make the universe, but you buy the idea that it could have created itself? Which view is more "magical" in thinking? You can be sure that something is not true without being able to prove what the real cause is. I do not believe there is a god at all, so you know there isn't one or you believe there isn't one? If you just believe it to be so, then that allows for another possibility to also be true. so I am not agnostic.....
If I told you I believed it was turtles all the way down holding up the earth you would instantly know I was 100% wrong and that it was not true, you wouldnt say there was a slight chance I was right and your beliefs were wrong because there are no turtles holding up the earth....this is how I feel regarding all religion origin/creation stories.... because this is a truth claim that can be proved or disproved. One could still hold the opinion or belief if one chose to, but it wouldn't be rational or logical.
.....do you think heaven is really above earth in the clouds and everyone has wings and plays harps?