According to others, virtue consists in the judicious pursuit of our own private interest and happiness, or in the proper government and direction of those selfish affections which aim solely at this end. In the opinion of these, therefore, virtue consists in prudence.
Another set of authors make virtue consist in those affections only which aim at the happiness of others, not in those which aim at our own. According to them, therefore, disinterested benevolence is the only motive which can stamp upon actions the character of virtue.
The character of virtue, it is evident, must either be ascribed indifferently to all our affections, when under proper government and direction; or be confined to some one class or division of them.
The great division of our affections is into the selfish and the benevolent. If the character of virtue, therefore, cannot be ascribed indifferently to all our affections, when under proper government and direction, it must be confined either to those which aim directly at our own private happiness, or to those which aim directly at that of others. If virtue, therefore, does not consist in propriety, it must consist either in prudence or in benevolence. Besides these three, it is scarce possible to imagine that any other account can be given of the nature of virtue. I shall endeavour to show hereafter how all the other accounts, which are seemingly different from any of these, coincide at bottom with some one or other of them.
CHAP. Ⅰ.—Of those Systems which make Virtue consist in Propriety.
ACCORDING to Plato, to Aristotle, and to Zeno, virtue consists in the propriety of conduct, or in the suitableness of the affection from which we act to the object which excites it.
Ⅰ. In the system of Plato (See Plato de Rep. lib. iv.) the soul is considered as something like a little state or republic, composed of three different faculties or orders.
The first is the judging faculty, the faculty which determines not only what are the proper means for attaining any end, but also what ends are fit to be pursued, and what degree of relative value we ought to put upon each. This faculty Plato called, as it is very properly called, reason, and considered it as what had a right to be the governing principle of the whole. Under this appellation, it is evident, he comprehended not only that faculty by which we judge of truth and falsehood, but that by which we judge of the propriety or the impropriety of our desires and affections.
The different passions and appetites, the natural subjects of this ruling principle, but which are so apt to rebel against their master, he reduced to two different classes or orders. The first consisted of those passions, which are founded in pride and resentment, or in what the schoolmen called the irascible part of the soul; ambition, animosity, the love of honour, and the dread of shame, the desire of victory, superiority, and revenge; all those passions, in short, which are supposed either to rise from, or to denote what, by a metaphor in our language, we commonly call spirit or natural fire. The second consisted of those passions which are founded in the love of pleasure, or in what the schoolmen called the concupiscible part of the soul. It comprehended all the appetites of the body, the love of ease and of security, and of all the sensual gratifications.