There's so much we don't know and can't know right now. And I'm good with that.
I personally cannot reconcile your statement and the idea that there is no intelligent life greater than us. The facts we can't know could be known by something else which would effectively make that entity greater than I and my species (a god). So, if there's intelligence that is greater than I, (a god) it could be said that I may have been caused by that intelligence. Therefore, I operate on the belief that I was caused by an intelligent force. It's just a theory, I know, but so is everything else. However it's important to note that not all theories are created equal.
-Sab