Pride, by definition, is the exaltation of self above rightful authority. Small wonder that Christian theology has traditionally regarded pride as the deadliest of the deadly sins, for it alone among sins denies that God is God. Pride does not merely disobey God. Pride also entertains the grand ambition of replacing God. And why replace God? Because, says Pride, it can do a better job than God. This was Eve’s sin—she thought she knew better than God what was best for her.

from The End of Christianity