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 of the abstract idea of a man or of a God, but if you come to anything like an intelligible proposition, you must either individualise and define, or destroy the very idea you contemplate. Sir Joshua goes into this question at considerable length in the Third Discourse.

“To the principle I have laid down, that the idea of beauty in each species of beings is an invariable one, it may he objected,” he says, “that in every particular species there are various central forms, which are separate and distinct from each other, and yet are undeniably beautiful; that in the human figure, for instance, the beauty of Hercules is one, of the Gladiator another, of the Apollo another, which makes so many different ideas of beauty. It is true, indeed, that these figures are each perfect in their kind, though of different characters and proportions; but still none of them is the representation of an individual, but of a class. And as there is one general form, which, as I have said, belongs to the human kind at large, so in each of these classes there is one common idea which is the abstract of the various individual forms belonging to that class. Thus, though the forms of childhood and age differ exceedingly, there is a common form in childhood, and a common form in age, which is the