Stitch with @itsadamrich: "What do you believe caused everything to exist. I can't wait to hear this."
"I don't know if you're ready to hear this, Adam, because the answer is: nothing. Nothing caused everything to exist, because everything always existed. Matter and energy cannot be created, nor destroyed, so all matter and all energy always existed, off into the eternity of the singularity before time, an existence before reality, before notions like 'before' even had meaning. The universe is the Great Uncaused, Adam, and I know you understand that concept: you embrace it, and you apply it where it's most comfortable. You imagine the universe to be a creation that therefore requires a creator; I see the universe as it is, and that is that it simply is, and in one form or another, it always is. That it's born and it lives and it dies and it's born again from its own cosmic ashes in an infinite cycle, because the universe is perfectly complete within itself."