pain a presumption of death, while, in fact, it is rather a sign of life. For though it be a question whether that which suffers can continue to live for ever, yet it is certain that everything which suffers pain does live, and that pain can exist only in a living subject. It is necessary, therefore, that he who is pained be living, not necessary that pain kill him; for every pain does not kill even those mortal bodies of ours which are destined to die. And that any pain kills them is caused by the