Wouldn't life be dull if we knew everything? We don't know why are we here. Or why we can only travel one way through time. We can't explain everything about human mind. We know less about deepest oceans than we know about surface of the moon. We don't know what are dreams really for. But if you ask us what came before the Big Bang, honestly, we have no idea. But there is one thing we know for sure, if we had all the answers, there will be nothing else to discover. Ignorance is bliss.