You can always tell a real friend: when you've made a fool of yourself he doesn't feel you've done a permanent job.
Education is a method whereby one acquires a higher grade of prejudices.
Many an optimist has become rich simply by buying out a pessimist.
Everyone is in awe of the lion tamer in a cage with half a dozen lions-everyone but a school bus driver.
A man doesn't know what he knows until he knows what he doesn't know.
Expert: a man who makes three correct guesses consecutively.