Men in power have two classes of friends; one for the useful, the other for the pleasant.
Both qualities are found in the good man; but he will not be the friend of a superior, unless he be surpassed (by that superior) in virtue also.

In all the kinds of friendship now specified there is equality (VI.).

There are friendships where one party is superior, as father and son, older and younger, husband and wife, governor and governed.

In such cases there should be a proportionably greater love on the part of the inferior.

When the love on each side is proportioned to the merit of the party beloved, then we have a certain species of equality, which is an ingredient in friendship.