Calamus fortior gladio.
Never can custom conquer nature, for she is ever unconquered.
What is there that is illustrious that is not also attended by labor?
If you pursue good with labor, the labor passes away but the good remains; if you pursue evil with pleasure, the pleasure passes away and the evil remains.
Gratitude is not only the greatest of virtues, but the parent of all the others.
A friend is, as it were, a second self.