I think Bill Watterson put it best:
Calvin: I decided I believe in astrology and horoscopes.

Hobbes: Really?

Calvin: You bet. It only makes sense that every facet of our daily lives should depend upon the position of celestial bodies hudreds of millions of miles away. Look here. Today I'll have "Key policies implemented". I get to have my way!

Hobbes: Oh those mischievous planets.
Also:
Calvin: I've decided to be a fatalist. All events are preordained and unalterable. That way, if anything bad happens, it's not my fault.

Hobbes: <Trips Calvin>

Calvin: WAUGH!

Hobbes: Too bad you were fated to do that.

Calvin: THAT WASN'T FATE!