The Principle of Motions

According to this motion alone nothing of the being of a thing is changed as of that which is changed in quality. The boundaries to change in quality are the contrary passive qualities and to increase in diminution either magnitude or parvitude. According to corruption and generation simply assumed are opposed to that which is simply assumed and each particular to each. If it is impossible to be at the same time changed according to contrary mutations mutation will not be continued but there will be time between them. There may be a certain infinite motion one and continued, we shall now assert.