Learn to say No—and to be rude about it when necessary. Otherwise you will not have time to carry out your duty, or to do your own work, and certainly no time for love and happiness. The termites will nibble away your life and leave none of it for you.

- I'm so busy doing what I must do that I don't have time for what I ought to do... and I never get a chance to do what I want to do! - Son, that's universal. The way to keep that recipe from killing you is occasionally to do what you want to do anyhow.

There are things which cannot be taught in ten easy lessons, nor popularized for the masses; they take years of skull sweat.

By the data to date, there is only one animal in the Galaxy dangerous to man -- man himself. So he must supply his own indispensable competition. He has no enemy to help him.

Never try to outstubborn a cat.

Whores perform the same function as priests, but far more thoroughly.

That old saw about the early bird just proves that the worm should have stayed in bed.