Aristoteles quidem ait: 'Omnes ingeniosos melancholicos esse.' Aristotle says that all men of genius are melancholy.

That man is guilty of impertinence who considers not the circumstances of time, or engrosses the conversation, or makes himself the subject of his discourse, or pays no regard to the company he is in.

Justice consists in doing no injury to men; decency in giving them no offense.

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.

If wisdom be attainable, let us not only win but enjoy it.

To be ignorant of what occurred before you were born is to remain always a child. For what is the worth of human life, unless it is woven into the life of our ancestors by the records of history?

It is our own evil thoughts which madden us.