The friendship of children for their parents (like that of men for the gods) is friendship for what is good and superior to themselves, as the source of the greatest benefits, namely, of their life and nurture, and their education from their birth upwards.

Friendship of this kind brings with it more, both of pleasure and profit, than that of strangers, in proportion as there is more community of life.

The friendship of brothers has all the characteristics of the friendship of comrades, and has them in a greater degree (provided they are good and generally resemble one another) inasmuch as they belong more to one another and love each other from their birth up, and have more similarity of character, as being of the same stock and brought up together and educated alike; moreover, they have had the longest and the surest experience of one another.

In all other kinsmen’s friendships the same elements will be found in proportion to the relationship.