"My opinion is that he's a swindler and you're a sucker." — John McCarthy

An extreme optimist is a man who believes that humanity will probably survive even if it doesn't take his advice.

My hobby of not attending meetings about recycling saves more energy than your hobby of recycling.

Suicidal terrorists may have short shelf lives.

It is said that man doesn't live by bread alone. Sometimes this is unfortunate, because people who cannot live by bread alone too often kill other people in consequence of the fights they get into.