Nothing in life is more necessary than friendship.
In inventing a model we may assume what we wish, but should avoid impossibilities.
A bad man can do a million times more harm than a beast.
Courage is the first virtue that makes all other virtues possible.
Gentleness is the ability to bear reproaches and slights with moderation, and not to embark on revenge quickly, and not to be easily provoked to anger, but be free from bitterness and contentiousness, having tranquility and stability in the spirit.
Misfortune shows those who are not really friends.