The secret source of humor is not joy but sorrow; there is no humor in Heaven.
Your time is limited, don't waste it living someone else's life.
In three words I can sum up everything I've learned about life: it goes on.
Life is really simple, but we insist on making it complicated.
Against the assault of laughter, nothing can stand.
Laughter is the sun that drives winter from the human face.
Life is what happens when you're busy making other plans.
Life is 10% what happens to us and 90% how we react to it.