St Thomas passes from 'immovable' to 'immutable.' Aristotle (Physics, vii, 2), distinguishes three sorts of 'motion': 'local motion' (now the subject matter of dynamics); 'change,' or 'motion in quality' (now the matter of chemistry); 'growth and decay,' or 'motion in quantity' (matter of biology). Thus three incongruous things were labelled with one name, to the prejudice of science for many centuries.

Of God and His Creatures: 1.14