Somewhat more rational grounds appear for the assertion that the sense of the beautiful arises from familiarity with the object, though even this could not long be maintained by a thinking person. For all that can be alleged in defence of such a supposition is, that familiarity deprives some objects which at first appeared ugly, of much of their repulsiveness, whence it is as rational to conclude that familiarity is the cause of beauty, as it would be to argue that because it is possible to acquire a taste for olives, therefore custom is the cause of lusciousness in grapes. Nevertheless, there are some phenomena resulting from the tendency of our nature to be influenced by habit of which it may be well to observe the limits. Sec. 4. The twofold operation of custom. It deadens sensation, but confirms affection. Sec. 5. But never either creates or destroys the essence of beauty. Custom has a twofold operation: the one to deaden the frequency and force of repeated impressions, the other to endear the familiar object to the affections. Commonly, where the mind is vigorous, and the power of sensation very perfect, it has rather the last operation than the first; with meaner minds, the first takes place in the higher degree, so that they are commonly characterized by a desire of excitement, and the want of the loving, fixed, theoretic power. But both take place in some degree with all men, so that as life advances, impressions of all kinds become less rapturous owing to their repetition. It is however beneficently ordained that repulsiveness shall be diminished by custom in a far greater degree than the sensation of beauty, so that the anatomist in a little time loses all sense of horror in the torn flesh, and carous bone, while the sculptor ceases not to feel to the close of his life, the deliciousness of every line of the outward frame. So then as in that with which we are made familiar, the repulsiveness is constantly diminishing, and such claims as it may be able to put forth on the affections are daily becoming stronger, while in what is submitted to us of new or strange, that which may be repulsive is felt in its full force, while no hold is as yet laid on the affections, there is a very strong preference induced in most minds for that to which they are not accustomed over that they know not, and this is strongest in those which are least open to sensations of positive beauty. But however far this operation may be carried, its utmost effect is but the deadening and approximating the sensations of beauty and ugliness. It never mixes nor crosses, nor in any way alters them; it has not the slightest connection with nor power over their nature. By tasting two wines alternately, we may deaden our perception of their flavor; nay, we may even do more than can ever be done in the case of sight, we may confound the two flavors together. But it will hardly be argued therefore that custom is the cause of either flavor. And so, though by