An error doesn't become a mistake until you refuse to correct it.

Tact is the ability to make a person see lightning without letting him feel the bolt.

Knowledge is the best eraser in the world for disharmony, distrust, despair, and the endless physical deficiencies of man.

One good thing about punctuality is that it's a sure way to help you enjoy a few minutes of privacy.

Knowledge is power, especially when it is hitched to a workhorse.

Praise can be your most valuable asset as long as you don't aim it at yourself.

One of the most lasting pleasures you can experience is the feeling that comes over you when you genuinely forgive an enemy - whether he knows it or not.