ovement was aterm covering all sorts of qualitative alterations, such as warm things becoming cold, growth from embryo to adult form, etc. It was never conceived of as merely motion, i.e., change of position in a homogeneous space. When we speak of amusical movement, or apolitical movement, we come close to the sense attached to the idea in ancient science: aseries of changes tending to complete or perfect aqualitative whole and fulfill an end.