Friends show me what I can do, foes teach me what I should do.

Nothing leads to good that is not natural.

This is the curse of an evil deed, that it incites and must bring forth more evil.

Truth suffers no loss if a vehement youth fails in finding it, in the same way that virtue and religion suffer no detriment if a criminal denies them.

Satisfied if they themselves can escape from the hard labour of thought, they willingly abandon to others the guardianship of their thoughts.

The painter is, as to the execution of his work, a mechanic; but as to his conception and spirit and design he is hardly below even the poet.

In a narrow circle the mind grows narrow. The more one expands, the larger their aims.