To tremble before anticipated evils is to bemoan what thou hast never lost.

Mastery passes often for egotism.

You shall abstain, shall abstain. That is the eternal song.

Mathematics can remove no prejudices and soften no obduracy. It has no influence in sweetening the bitter strife of parties, and in the moral world generally its action is perfectly null.

There is a courtesy of the heart; it is allied to love. From its springs the purest courtesy in the outward behavior.

A man's shortcomings are taken from his epoch; his virtues and greatness belong to himself.

All theory, dear friend, is gray, but the golden tree of life springs ever green.