you can measure the size of a person by what makes him or her angry

When dealing with people, let us remember that we are not dealing with creatures of logic. We are dealing with creatures of emotion, creatures bristling with prejudices and motivated by pride and vanity. ...Any fool can criticize, condemn, and complain - and most fools do. But it takes character and self-control to be understanding and forgiving.

You must have a good time meeting people if you expect them to have a good time meeting you.

There is only one way under high heaven to get anybody to do anything. Did you ever stop to think of that? Yes, just one way. And that is by making the other person want to do it.

Give the other person a fine reputation to live up to.

Let's find and remedy all our weaknesses before our enemies get a chance to say a word. That is what Charles Darwin did. ...When Darwin completed the manuscript of his immortal book "The Origin Of Species" he realized that the publication of his revolutionary concept of creation would rock the intellectual and religious worlds. So he became his own critic and spent another 15 years checking his data, challenging his reasoning, and criticizing his conclusions.

Criticism is futile because it puts a person on the defensive and usually makes them strive to justify themselves. Criticism is dangerous, because it wounds a person's precious pride, hurts their sense of importance, and arouses resentment.