I had a revelation recently. You know when you talk with the religious folks about where everything comes from, what 'created' it, and what its purpose is; to explain evolution and stuff is easy, but you get stuck with the big bang at the latest, and what caused all those natural laws which govern the universe and us. Actually, cause and effect came into existence alongside space, energy, matter and time with the big bang only, and according to Stephen Hawking, it's perfectly within the known laws of nature, that nothing caused the universe.
http://www.youtube.com/watch?v=WQhd05ZVYWg&hd=1
http://www.youtube.com/watch?v=WQhd05ZVYWg&hd=1