Beauty is defined by Baumgarten as a correspondence, _i.e._ an order of the parts in their mutual relations to each other and in their relation to the whole. The aim of beauty itself is to please and excite a desire, “_Wohlgefallen und Erregung eines Verlangens._” (A position precisely the opposite of Kant’s definition of the nature and sign of beauty.) With reference to the manifestations of beauty, Baumgarten considers that the highest embodiment of beauty is seen by us in nature, and he therefore thinks that the highest aim of art is to copy nature. (This position also is directly contradicted by the conclusions of the latest æstheticians.) Passing over the unimportant followers of Baumgarten,—Maier, Eschenburg, and Eberhard,—who only slightly modified the doctrine of their teacher by dividing the pleasant from the beautiful, I will quote the definitions given by writers who came immediately after Baumgarten, and defined beauty quite in another way. These writers were Sulzer, Mendelssohn, and Moritz. They, in contradiction to Baumgarten’s main position, recognise as the aim of art, not beauty, but goodness. Thus Sulzer (1720-1777) says that only that can be considered beautiful which contains goodness. According to his theory, the aim of the whole life of humanity is welfare in social life. This is attained by the education of the moral feelings, to which end art should be subservient. Beauty is that which evokes and educates this feeling. Beauty is understood almost in the same way by Mendelssohn (1729-1786). According to him, art is the carrying forward of the beautiful, obscurely recognised by feeling, till it becomes the true and good. The aim of art is moral perfection.[11] For the æstheticians of this school, the ideal of beauty is a beautiful soul in a beautiful body. So that these æstheticians completely wipe out Baumgarten’s division of the Perfect (the Absolute), into the three forms of Truth, Goodness, and Beauty; and Beauty is again united with the Good and the True. But this conception is not only not maintained by the later æstheticians, but the æsthetic doctrine of Winckelmann arises, again in complete opposition. This divides the mission of art from the aim of goodness in the sharpest and most positive manner, makes external beauty the aim of art, and even limits it to visible beauty. According to the celebrated work of Winckelmann (1717-1767), the law and aim of all art is beauty only, beauty quite separated from and independent of goodness. There are three kinds of beauty:—(1) beauty of form, (2) beauty of idea, expressing itself in the position of the figure (in plastic art), (3) beauty of expression, attainable only when the two first conditions are present. This beauty of expression is the highest aim of art, and is attained in antique art; modern art should therefore aim at imitating ancient art.[12]