All significant achievement comes from daring from experiment from the willingness to risk failure.

The most important thing in an argument, next to being right, is to leave an escape hatch for your opponent, so that he can gracefully swing over to your side without too much apparent loss of face.

Maturity begins when we're content to feel we're right about something without feeling the necessity to prove someone else wrong.

Perseverance is the most overrated of traits, if it is unaccompanied by talent; beating your head against a wall is more likely to produce a concussion in the head than a hole in the wall.

Skepticism is not an end in itself; it is a tool for the discovery of truths.

A truly successful person knows how to overcome the past, use the present, and prepare for the future-but unless we can first surmount the past, we cannot effectively cope with either the present or the future.

No one should pay attention to a man delivering a lecture or a sermon on his "philosophy of life" until we know exactly how he treats his wife, his children, his neighbors, his friends, his subordinates and his enemies.