Because most people are not sufficiently employed in themselves they run about loose hungering for employment and satisfy themselves in various supererogatory occupations. The easiest of these occupations which have all to do with making things already made is the making of people: it is called the art of friendship.

The private interest of the individual would not be sufficiently provided for by reasonable and cool self-love alone therefore the appetites and passions are placed within as a guard and further security without which it would not be taken due care of.

God created man and finding him not sufficiently alone gave him a companion to make him feel his solitude more keenly.