The mind unlearns with difficulty what it has long learned.

The best ideas are common property.

When once ambition has passed its natural limits, its progress is boundless.

If you expect the wise man to be as angry as the baseness of crimes requires, then he must not only be angry but go insane.

It is difficult to bring people to goodness with lessons, but it is easy to do so by example.

He is ungrateful who denies that he has received a kindness which has been bestowed upon him; he is ungrateful who conceals it; he is ungrateful who makes no return for it; most ungrateful of all is he who forgets it.

Be silent as to services you have rendered, but speak of favours you have received.