What you desire when young, you have in abundance when old.

One is never deceived; one deceives oneself.

The world only goes forward because of those who oppose it.

Art rests on a kind of religious sense, on a deep, steadfast earnestness; and on this account it unites so readily with religion.

The credit of advancing science has always been due to individuals and never to the age.

If you want someone to develop a specific trait, treat them as though they already had it.

We must always change, renew, rejuvenate ourselves; otherwise, we harden.