Sam Harris has spoken so eloquently on these matters that he could save a lot of time and unnecessary posts here. While he may not be a God-given authority (!), he's well worth listening to.
Sample video:
Some lighter entertainment from Bill Maher:
Also worth checking out: Christopher Hitchens, Richard Dawkins, Daniel Dennett.

Edited by redewenur (11/19/11 05:49 AM)
"Time is what prevents everything from happening at once" - John Wheeler