Reason is to living at the beck and call of passion, and aiming at the truly noble to aiming at apparent advantage.
Now all approve and commend those who are eminently earnest about honourable actions, and if all would vie with one another in respect of the καλὸν, and be intent upon doing what is most truly noble and honourable, society at large would have all that is proper while each individual in particular would have the greatest of goods, Virtue being assumed to be such.
And so the good man ought to be Self-loving: because by doing what is noble he will have advantage himself and will do good to others: but the bad man ought not to be, because he will harm himself and his neighbours by following low and evil passions. In the case of the bad man, what he ought to do and what he does are at variance, but the good man does what he ought to do, because all Intellect chooses what is best for itself and the good man puts himself under the direction of Intellect.