Raphael Mengs, the painter, was an intimate friend of Winckelmann and associated himself with him in his search for a true definition of the beautiful. His ideas were generally in accordance with those of Winckelmann. He defines beauty as "the visible idea of perfection, which is to perfection what the visible is to the mathematical point." He falls under the influence of the argument from design. The Creator has ordained the multiplicity of beauties. Things are beautiful according to our ideas of them, and these ideas come from the Creator. Thus each beautiful thing has its own type, and a child would appear ugly if it resembled a man. He adds to his remarks in this sense: "As the diamond is alone perfect among stones, gold among metals, and man among living creatures, so there is distinction in each species, and but little is perfect." In his _Dreams of Beauty_, he looks upon beauty as "an intermediate disposition," which contains a part of perfection and a part of the agreeable, and forms a _tertium quid_, which differs from the other two and deserves a special name. He names four sources of the art of painting: beauty, significant or expressive character, harmony, and colouring. The first of these he finds among the ancients, the second with Raphael, the third with Correggio, the fourth with Titian. Mengs does not succeed in rising above this empiricism of the studio, save to declaim about the beauty of nature, virtue, forms, and proportions, and indeed everything, including the First Cause, which is the most beautiful of all.