Books Eighth and Ninth. Friendship:--Grounds of Friendship. Varieties
of Friendship, corresponding to different objects of liking.
Friendship between the virtuous is alone perfect. A settled habit, not
a mere passion. Equality in friendship. Political friendships.
Explanation of the family affections. Rule of reciprocity of services.
Conflicting obligations. Cessation of friendships. Goodwill. Love felt
by benefactors. Self-love. Does the happy man need friends?
