The line between lawful and unlawful abortion will be marked by the fact of having sensation and being alive.

It seems that ambition makes most people wish to be loved rather than to love others.

Jealousy is both reasonable and belongs to reasonable men, while envy is base and belongs to the base, for the one makes himself get good things by jealousy, while the other does not allow his neighbour to have them through envy.

All teaching and all intellectual learning come about from already existing knowledge.

If, therefore, there is any one superior in virtue and in the power of performing the best actions, him we ought to follow and obey, but he must have the capacity for action as well as virtue.

My lectures are published and not published; they will be intelligible to those who heard them, and to none beside.

A courageous person is one who faces fearful things as he ought and as reason directs for the sake of what is noble.