Always avoid the acute angle.

Even in such technical lines as engineering, about 15% of one's financial success is due one's technical knowledge and about 85% is due to skill in human engineering, to personality and the ability to lead people.

Great speakers are not born, they're trained.

By criticizing, we do not make lasting changes and often incur resentment.

One of the surest ways of making a friend and influencing the opinion of another is to give consideration to [his or her] opinion, let [him or her] sustain a feeling of importance.

Keep your mind open to change all the time. Welcome it. Court it. It is only by examining and reexamining your opinions and ideas that you can progress.

In order to make friends you must first be friendly