Appetites or Passions make him any-way injurious to them. Now, if by the natural Constitution of any rational Creature, the same Irregularitys of Appetite which make him ill to Others, make him ill also to Himself; and if the same Regularity of Affections, which causes him to be good in one sense, causes him to be good also in the other; then is that goodness by which he is thus useful to others, a real Good and Advantage to himself. And thus Virtue and Interest may be found at last to agree.
Of this we shall consider particularly in the latter part of our Inquiry. Our first Design is, to see if we can clearly determine what that Quality is to which we give the Name of Goodness, or Virtue.
Shou'd a Historian or Traveller describe to us a certain Creature of a more solitary Disposition than ever was yet heard of; one who had neither Mate nor Fellow of any kind; nothing of his own Likeness, towards which he stood well-affected or inclin'd; nor any thing without, or beyond himself, for which he had the least Passion or Concern: we might be apt to say perhaps, without much hesitation, "That this was doubtless a very melancholy Creature, and that in this unsociable andsullen
