The same ideas, one must believe, recur in men's minds not once or twice but again and again.

It is our choice of good or evil that determines our character, not our opinion about good or evil.

If you would understand anything, observe its beginning and its development

We must be neither cowardly nor rash but courageous.

The only way to achieve true success is to express yourself completely in service to society.

Happiness belongs to the self sufficient.

For suppose that every tool we had could perform its task, either at our bidding or itself perceiving the need, and if-like the statues made by Dædalus or the tripods of Hephæstus, of which the poet says that "self-moved they enter the assembly of the gods" - shuttles in a loom could fly to and fro and a plectrum play a lyre all self-moved, then master-craftsmen would have no need of servants nor masters of slaves.