Hume's key to aesthetic judgment

David Hume said, in his essay "Of the Standard of Taste":

One obvious cause, why many feel not the proper sentiment of beauty, is the want of that delicacy of imagination, which is requisite to convey a sensibility of those finer emotions. This delicacy every one pretends to: Every one talks of it; and would reduce every kind of taste or sentiment to its standard. But as our intention in this essay is to mingle some light of the understanding with the feelings of sentiment, it will be proper to give a more accurate definition of delicacy than has hitherto been attempted. And not to draw our philosophy from too profound a source, we shall have recourse to a noted story in Don Quixote.

It is with good reason, says Sancho to the squire with the great nose, that I pretend to have a judgment in wine: This is a quality hereditary in our family. Two of my kinsmen were once called to give their opinion of a hogshead, which was supposed to be excellent, being old and of a good vintage. One of them tastes it; considers it; and, after mature reflection, pronounces the wine to be good, were it not for a small taste of leather, which he perceived in it. The other, after using the same precautions, gives also his verdict in favour of the wine; but with the reserve of a taste of iron, which he could easily distinguish. You cannot imagine how much they were both ridiculed for their judgment. But who laughed in the end? On emptying the hogshead, there was found at the bottom an old key with a leathern thong tied to it.

The great resemblance between mental and bodily taste will easily teach us to apply this story. Though it be certain, that beauty and deformity, more than sweet and bitter, are not qualities in objects, but belong entirely to the sentiment, internal or external; it must be allowed, that there are certain qualities in objects, which are fitted by nature to produce those particular feelings. Now as these qualities may be found in a small degree, or may be mixed and confounded with each other, it often happens that the taste is not affected with such minute qualities, or is not able to distinguish all the particular flavours, amidst the disorder in which they are presented. Where the organs are so fine, as to allow nothing to escape them; and at the same time so exact, as to perceive every ingredient in the composition: This we call delicacy of taste, whether we employ these terms in the literal or metaphorical sense. Here then the general rules of beauty are of use, being drawn from established models, and from the observation of what pleases or displeases, when presented singly and in a high degree: And if the same qualities, in a continued composition, and in a smaller degree, affect not the organs with a sensible delight or uneasiness, we exclude the person from all pretensions to this delicacy. To produce these general rules or avowed patterns of composition, is like finding the key with the leathern thong; which justified the verdict of Sancho’s kinsmen, and confounded those pretended judges who had condemned them. [If] the hogshead had never been emptied, the taste of the one was still equally delicate, and that of the other equally dull and languid: But it would have been more difficult to have proved the superiority of the former, to the conviction of every bye-stander. In like manner, [if] the beauties of writing had never been methodized, or reduced to general principles; [if] no excellent models had ever been acknowledged; the different degrees of taste would still have subsisted, and the judgment of one man been preferable to that of another; but it would not have been so easy to silence the bad critic, who might always insist upon his particular sentiment, and refuse to submit to his antagonist. But when we show him an avowed principle of art; when we illustrate this principle by examples, whose operation, from his own particular taste, he acknowledges to be conformable to the principle; when we prove that the same principle may be applied to the present case, where he did not perceive or feel its influence: He must conclude, upon the whole, that the fault lies in himself, and that he wants the delicacy, which is requisite to make him sensible of every beauty and every blemish, in any composition or discourse.

It's easy to object that aesthetic taste is unlike physical taste in many ways. Few would doubt that. But I still find Hume's analogy useful — not so much as a logical proof, but as a vivid illustration of a basic truth.