There is a lower self (predominant with most men) that gratifies the appetites, seeking wealth, power, &c.
With the select few, there is a higher self that seeks the honourable, the noble, intellectual excellence, at any cost of pleasure, wealth, honour, &c.

These noble-minded men procure for themselves the greater good by sacrificing the less: and their self-sacrifice is thus a mode of self.

It is the duty of the good man to love himself: for his noble life is profitable, both to himself, and to others; but the bad man ought not to love himself.

[Self-sacrifice, formerly brought under Courage, is here depicted from another point of view] (VIII.).
By way of bringing out the advantages of friendship, it is next asked, Does the happy man need friends?
To this, it is answered, (1) That happiness, being the sum of all human good, must suppose the possession of the greatest of external goods, which is friendship.

(2) The happy man will require friends as recipients, of his overflow of kindness.
(3) He cannot be expected either to be solitary, or to live with strangers.