Adversityis the foundation of virtue.

Bythree methods we may learn wisdom: first, by reflection, which is noblest;second, imitation, which is easiest; and third by experience, which is thebitterest.

Themost important of life's battles is the one we fight daily in the silentchambers of the soul.

The highest pleasure to be got out of freedom, and having nothing to do, is labour

Man must not check reason by tradition, but must check tradition by reason.

Do not tell me the problem is a difficult one. If it were not difficult, it would not be a problem

The exercise of power is determined by thousands ofinteractions between the world of the powerful and that of the powerless, allthe more so because these worlds are never divided by a sharp line: everyonehas a small part of himself in both.

Informationis a negotiator's greatest weapon.

The hearthas arguments with which the logic of mind is not acquainted.

Humor is the affectionate communication of insight.

Luck never mad a mad man wise

Conflictinvolves incompatible behaviors rather thancompetitive goals.