We have time enough if we but use it aright

If one mistreats citizens of foreign countries, one infringes upon one's duty toward one's own subjects; for thus one exposes themto the law of retribution.

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.

Happy the man who early learns the wide chasm that lies between his wishes and his powers.

Man's restlessness makes him strive.

He who is resolute conquers grief.

Man is not born to solve the problem of the universe, but to find out what he has to do; and to restrain himself within the limits of his comprehension.