Think continually how many physicians are dead after often contracting their eyebrows over the sick; and how many astrologers after predicting with great pretensions the deaths of others; and how many philosophers after endless discourses on death or immortality; how many heroes after killing thousands; and how many tyrants who have used their power over men's lives with terrible insolence as if they were immortal; and how many cities are entirely dead, so to speak, Helice and Pompeii and Herculaneum, and others innumerable. Add to the reckoning all whom thou hast known, one after another. One man after burying another has been laid out dead, and another buries him: and all this in a short time. To conclude, always observe how ephemeral and worthless human things are, and what was yesterday a little mucus to-morrow will be a mummy or ashes. Pass then through this little space of time conformably to nature, and end thy journey in content, just as an olive falls off when it is ripe, blessing nature who produced it, and thanking the tree on which it grew.
Epicurus says, In my sickness my conversation was not about my bodily sufferings, nor, says he, did I talk on such subjects to those who visited me; but I continued to discourse on the nature of things as before, keeping to this main point, how the mind, while participating in such movements as go on in the poor flesh, shall be free from perturbations and maintain its proper good. Nor did I, he says, give the physicians an opportunity of putting on solemn looks, as if they were doing something great, but my life went on well and happily. Do, then, the same that he did both in sickness, if thou art sick, and in any other circumstances; for never to desert philosophy in any events that may befall us, nor to hold trifling talk either with an ignorant man or with one unacquainted with nature, is a principle of all schools of philosophy; but to be intent only on that which thou art now doing and on the instrument by which thou doest it.