Six mistakes mankind keeps making century after century: Believing that personal gain is made by crushing others; Worrying about things that cannot be changed or corrected; Insisting that a thing is impossible because we cannot accomplish it; Refusing to set aside trivial preferences; Neglecting development and refinement of the mind; Attempting to compel others to believe and live as we do.

No power is strong enough to be lasting, if it labours under the weight of fear.

Nothing is so difficult to believe that oratory cannot make it acceptable, nothing so rough and uncultured as not to gain brilliance and refinement from eloquence.

If the truth were self-evident, eloquence would be unnecessary.

Inability to tell good from evil is the greatest worry of man's life.

Ignorance of impending evil is far better than a knowledge of its approach.

There is no opinion so stupid that it can't be expressed by some philosopher.