Whether love is properly divided into love of friendship and love of concupiscence?

Objections

Objection 1 : It would seem that love is not properly divided into love of friendship and love of concupiscence. For "love is a passion, while friendship is a habit," according to the Philosopher (Ethic. viii, 5). But habit cannot be the member of a division of passions. Therefore love is not properly divided into love of concupiscence and love of friendship.
Objection 2 : Further, a thing cannot be divided by another member of the same division; for man is not a member of the same division as "animal." But concupiscence is a member of the same division as love, as a passion distinct from love. Therefore concupiscence is not a division of love.
Objection 3 : Further, according to the Philosopher (Ethic. viii, 3) friendship is threefold, that which is founded on "usefulness," that which is founded on "pleasure," and that which is founded on "goodness." But useful and pleasant friendship are not without concupiscence. Therefore concupiscence should not be contrasted with friendship.