For [in every art] some purpose must be conceived; otherwise we could not ascribe the product to art at all, and it would be a mere product of chance. But in order to accomplish a purpose, definite rules from which we cannot dispense ourselves are requisite. Now since the originality of the talent constitutes an essential (though not the only) element in the character of genius, shallow heads believe that they cannot better show themselves to be full-blown geniuses than by throwing off the constraint of all rules; they believe, in effect, that one could make a braver show on the back of a wild horse than on the back of a trained animal. Genius can only furnish rich material for products of beautiful art; its execution and its form require talent cultivated in the schools, in order to make such a use of this material as will stand examination by the Judgement.