He who can not learn to love must flatter.

The greater part of all the mischief in the world arises from the fact that men do not sufficiently understand their own aims.

Science has been seriously retarded by the study of what is not worth knowing and of what is not knowable.

All truths are old, and all that we have to do is recognize and utter them anew.

All truly wise thoughts have been thought already thousands of times; but to make them truly ours, we must think them over again honestly, until they take root in our personal experience.

The force of a language does not consist of rejecting what is foreign but of swallowing it.

Desire is the presentiment of our inner abilities, and the forerunner of our ultimate accomplishments.