Book, Paragraph

 1   V, 6 |  violence is unnatural, then violent perishing is unnatural and
 2   V, 6 |      some becomings that are violent and not the result of natural
 3   V, 6 |    to natural becomings, and violent increases and decreases,
 4   V, 6 |    that some alterations are violent while others are natural,
 5 VII, 2 | motion away from itself more violent than the natural locomotion
 6 VIII, 4| motion is natural, in others violent and unnatural. Thus in things
 7 VIII, 4|      occupy, their motion is violent: when they are in motion
 8 VIII, 4|      something the motion is violent when it is unnatural, and
 9 VIII, 4|     natural or unnatural and violent, and all things whose motion
10 VIII, 4|   all things whose motion is violent and unnatural are moved