Both optimists and pessimists contribute to society. The optimist invents the aeroplane, the pessimist the parachute.
People who say it cannot be done should not interrupt those who are doing it.
The longer I live, the more convinced am I that this planet is used by other planets as a lunatic asylum.
I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it.
The single biggest problem in communication is the illusion that it has taken place.
You use a glass mirror to see your face; you use works of art to see your soul.