Artificial intelligence is no match for natural stupidity. (source unknown)

Don't take life so seriously. It isn't permanent! (Bugs Bunny)

Original: Do not take life too seriously; you will never get out of it alive. - Elbert Hubbard

If the world should blow itself up, the last audible voice would be that of an expert saying it can't be done. (Peter Ustinov)

Unsichtbar wird der Wahnsinn, wenn er genügend große Ausmaße angenommen hat. (Bertolt Brecht)

Only buy stock in a company that’s so good that an idiot can run it, because sooner or later one will. (Warren Buffet)

Nichts auf der Welt ist so gerecht verteilt wie der Verstand. Denn jedermann ist überzeugt, daß er genug davon habe. (Rene Descartes)

Don’t argue with idiots. They drag you down to their level and beat you with experience. (Greg King)

Probably inspired by:

Never argue with a fool; onlookers may not be able to tell the difference. (Mark Twain)

Wise men speak because they have something to say; Fools because they have to say something.

(Plato)

The hen is the wisest of all the animal creation because she never cackles until after the egg has been laid. (Abraham Lincoln)

Common sense is the collection of prejudices acquired by age eighteen. (Albert Einstein)

A casual stroll through the lunatic asylum shows that faith does not prove anything. (Friedrich Nietzsche)

A democracy is nothing more than mob rule, where fifty-one percent of the people may take away the rights of the other forty-nine. (Thomas Jefferson)

All paid jobs absorb and degrade the mind. (Aristotles)

If we choose, we can live in a world of comforting illusion. (Noam Chomsky)

Disziplin ist die Fähigkeit, dümmer zu erscheinen als der Chef. (Hanns Schwarz)

Better to remain silent and be thought a fool than to speak out and remove all doubt. (Abraham Lincoln)

Democracy passes into despotism. (Plato)

It is no measure of health to be well adjusted to a profoundly sick society. (Jiddu Krishnamurti)

I know exactly how you feel, I just don't care! (happy bunny / jim benton)

gott schweigt - ich aber spreche (golem XIV)

think - while it is still legal (atomsk on wongplanet.net)