Life is full of chances and changes, and the most prosperous of men may in the evening of his days meet with great misfortunes.

The happy life is regarded as a life in conformity with virtue. It is a life which involves effort and is not spent in amusement.

Wise people have an inward sense of what is beautiful, and the highest wisdom is to trust this intuition and be guided by it.

Concerning the generation of animals akin to them, as hornets and wasps, the facts in all cases are similar to a certain extent, but are devoid of the extraordinary features which characterize bees; this we should expect, for they have nothing divine about them as the bees have.

Rightness in our choice of an end is secured by [Moral] Virtue.

The quality of life is determined by its activities.

We may assume the superiority ceteris paribus of the demonstration which derives from fewer postulates or hypotheses - in short, from fewer premises.