The Importance of Quality

It is evident that nothing subsists between that which is moved, and that which moves when they are first and last with reference to that which is moving. It is necessary therefore that there should be a continuity in that which increases, and thatwhich is diminished; but in things continued there is nothing between. But whatever is changed in quality is so changed by sensibles,. And change in quantity alone subsists in such things as are said to be essentially passive to sensibles.