Mark Twain
If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.
More quotes and aphorisms
You will learn more from your failures than your successes...Live in such a way that you would not be ashamed...What can a pencil do for all of us?...It is the working man who is the happy man...Turkeys know their names, come when you call...The principal factors which influenced my life...