A Treatise on Painting/Chapter 109
Chap. CIX.—Of the Motion of the Members.
Let every member be employed in performing its proper functions. For instance, in a dead body, or one asleep, no member should appear alive or awake. A foot bearing the weight of the whole body, should not be playing its toes up and down, but flat upon the ground; except when it rests entirely upon the heel.