It remains true that Michelangelo's intensely personal use of the nude greatly altered its character. He changed it from a means of embodying ideas to a means of expressing emotions; he transformed it from the world of living to the world of becoming. And he projected his world of the imagination with such unequaled artistic power that its shadow fell on every male nude in art for three hundred and fifty years. Painters either imitated his heroic poses and proportions or they reacted against them self-consciously and sought a new repertoire of attitudes in the art of fifth-century Greece. In the nineteenth century the ghost of Michelangelo was still posing the models in art schools.

Ch. V: Energy - The Nude: A Study in Ideal Form (1951)