Put a thousand monkeys in a room and you get the work of Shakespeare. Put a thousand mentally inspired members in a forum, and you can figure out any truth, even the meaning of life.
I believe no stone should be unturned in a search for truth, and in the goodness of people, and in trying to prove everything you know to be wrong. And quite a few of the above things too...
My most important belief might be belief in the world and myself (even though its a bit lame, without them my belief system would be much weaker)