But here we must make a distinction. If that quality in another, which pleases or displeases, be constant and inherent in his person and character, it will cause love or hatred, independent of the intention: but otherwise a knowledge and design is requisite, in order to give rise to these passions. One that is disagreeable by his deformity or folly, is the object of our aversion, though nothing be more certain, than that he has not the least intention of displeasing us by these qualities. But if the uneasiness proceed not from a quality, but an action, which is produced and annihilated in a moment, 'tis necessary, in order to produce some relation, and connect this action sufficiently with the person, that it be derived from a particular forethought and design. 'Tis not enough that the action arise from the person, and have him for its immediate cause and author. This relation alone is too feeble and inconstant to be a foundation for these passions. It reaches not the sensible and thinking part, and neither proceeds from any thing _durable_ in him, nor leaves any thing behind it, but passes in a moment, and is as if it had never been. On the other hand, an intention shows certain qualities, which, remaining after the action is performed, connect it with the person, and facilitate the transition of ideas from one to the other. We can never think of him without reflecting on these qualities, unless repentance and a change of life have produced an alteration in that respect; in which case the passion is likewise altered. This, therefore, is one reason why an intention is requisite to excite either love or hatred. But we must farther consider, that an intention, besides its strengthening the relation of ideas, is often necessary to produce a relation of impressions, and give rise to pleasure and uneasiness. For 'tis observable, that the principal part of an injury is the contempt and hatred which it shows in the person that injures us; and without that, the mere harm gives us a less sensible uneasiness. In like manner, a good office is agreeable, chiefly because it flatters our vanity, and is a proof of the kindness and esteem of the person who performs it. The removal of the intention removes the mortification in the one case, and vanity in the other; and must of course cause a remarkable diminution in the passions of love and hatred.