Now since changes are of four kinds-either in respect of the 'what' or of the quality or of the quantity or of the place, and change in respect of 'thisness' is simple generation and destruction, and change in quantity is increase and diminution, and change in respect of an affection is alteration, and change of place is motion, changes will be from given states into those contrary to them in these several respects.
Beraz, aldaketak lau badira-zerkiaren, koalitatearen, 10) kantitatearen eta kokapenaren araberakoak-eta genesia eta usteldura zentzu absolutuan "honako honen" arabera ematen badira, handitzea eta gutxitzea kantitatearen arabera, aldakuntza koalitatearen arabera eta lekualdaketa kokapenaren arabera ematen badira, aldaketak banako bakoitzari dagokion kontrakorantz gertatuko dira.