One man cannot practice many arts with success.

It is right to give every man his due.

There are two things a person should never be angry at, what they can help, and what they cannot.

The man who makes everything that leads to happiness depend upon himself, and not upon other men, has adopted the very best plan for living happily.

Hardly any human being is capable of pursuing two professions or two arts rightly.

The measure of a man is what he does with power.