Friendship is the only point in human affairs concerning the benefit of which all, with one voice, agree.

I prefer the most unfair peace to the most righteous war.

Exercise and temperance can preserve something of our early strength even in old age.

Never can custom conquer nature, for she is ever unconquered.

We are motivated by a keen desire for praise, and the better a man is the more he is inspired by glory. The very philosophers themselves, even in those books which they write in contempt of glory, inscribe their names.

I follow nature as the surest guide, and resign myself with implicit obedience to her sacred ordinances.

Knowledge which is divorced from justice, may be called cunning rather than wisdom.