It is the nature of every person to error, but only the fool perseveres in error.

The rule of friendship means there should be mutual sympathy between them, each supplying what the other lacks and trying to benefit the other, always using friendly and sincere words.

What is dishonorably got, is dishonorably squandered.

What is permissible is not always honorable.

The most evident difference between man and animals is this: the beast, in as much as it is largely motivated by the senses and with little perception of the past or future, lives only for the present. But man, because he is endowed with reason by which he is able to perceive relationships, sees the causes of things, understands the reciprocal nature of cause and effect, makes analogies, easily surveys the whole course of his life, and makes the necessary preparations for its conduct.

Every animal loves itself.

Orators are most vehement when they have the weakest cause, as men get on horseback when they cannot walk.