Andrew Sullivan on the danger of self-righteousness

Andrew Sullivan on absolute fire in his weekly column for New York Magazine:

No party, no cause, no struggle, however worthy, is ever free from evil. No earthly cause is entirely good. And to believe with absolute certainty that you are on “the right side of history,” or on the right side of a battle between “good and evil,” is a dangerous and seductive form of idolatry. It flatters yourself. And it will lead you inevitably to lose your moral bearings because soon, you will find yourself doing and justifying things that are evil solely because they advance the cause of the “good.”