He is a man whom it is impossible to please, because he is never pleased with himself.

It is so hard that one cannot really have confidence in doctors and yet cannot do without them.

Self knowledge is best learned not by contemplation, but by action.

Each one of us must carry within the proof of immortality, it cannot be given from outside of us. To be sure, everything in natureis change but behind the change there is something eternal.

Devote each day to the object then in time and every evening will find something done.

Whoever, in middle age, attempts to realize the wishes and hopes of his early youth, invariably deceives himself. Each ten years of a man's life has its own fortunes, its own hopes, its own desires.

Many young painters would never have taken their pencils in hand if they could have felt, known, and understood, early enough, what really produced a master like Raphael.