A day without laughter is a day wasted.
Charlie Chaplin

Whoever undertakes to set himself up as a judge of Truth and Knowledge is shipwrecked by the laughter of the gods.
Albert Einstein

I believe that imagination is stronger than knowledge. That myth is more potent than history. That dreams are more powerful than facts. That hope always triumphs over experience. That laughter is the only cure for grief. And I believe that love is stronger than death.
Robert Fulghum

Against the assault of laughter nothing can stand.
Mark Twain