"Christianity - The belief that a cosmic Jewish Zombie who was his own father can make you live forever if you symbolically eat his flesh and telepathically tell him you accept him as your master, so he can remove an evil force from your soul that is present in humanity because a rib-woman was convinced by a talking snake to eat from a magical tree... yeah, makes perfect sense."
-- Anon., found on the web.
That was a funny quote that basically sums up the Christian religion.
Also one of my favorite Mark Twain (Samuel Clemens) quotes:
If Christ were here there is one thing he would not be -- a Christian.
-- Mark Twain, Notebook