Do you feel bad that you weigh only so many pounds instead of three hundred? Then you have just as much reason to feel bad that you live only so many years instead of longer. You accept the body size that was given to you. You should accept your lifespan the same way.
Dost thou grieve that thou dost weigh but so many pounds, and not three hundred rather? Just as much reason hast thou to grieve that thou must live but so many years, and not longer. For as for bulk and substance thou dost content thyself with that proportion of it that is allotted unto thee, so shouldst thou for time.