He who believes in freedom of the will has never loved and never hated.

God hath given you one face, and you make yourselves another.

Along with success comes a reputation for wisdom.

However great an evil immorality may be, we must not forget that it is not without its beneficial consequences. It is only through extremes that men can arrive at the middle path of wisdom and virtue.

No power in society, no hardship in your condition can depress you, keep you down, in knowledge, power, virtue, influence, but by your own consent.

There is no greater glory than love, nor any great punishment than jealously.

Whoever is left far from his source longs always for the day of his return to it.

Every man is guilty of all the good he did not do.

Faith and doubt cannot exist in the same mind at the same time, for one will dispel the other.

That is the essence of science: ask an impertinent question, and you are on the way to a pertinent answer.