Talk about your own mistakes before criticizing the other person.

In talking with people, don't begin by discussing the things on which you differ. Begin by emphasizing - and keep on emphasizing - the things on which you agree. Keep emphasizing, if possible, that you are both striving for the same end and that your only difference is one of method and not of purpose.

If you have some idea you believe in, don't listen to the croaking chorus. Listen only to what your own inner voice tells you.

The world is filled with interesting things to do. Don't lead a dull life in such a thrilling world.

It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.

He who treads softly goes far.

This is a hurried age we're living in. If you've got anything to say, say it quickly, get to the point and stop, and give the other man a chance to talk.