Meditations 10.31

When thou hast seen Satyron the Socratic, think of either Eutyches or Hymen, and when thou hast seen Euphrates, think of Eutychion or Silvanus, and when thou hast seen Alciphron think of Tropaeophorus, and when thou hast seen Xenophon, think of Crito or Severus, and when thou hast looked on thyself, think of any other Caesar, and in the case of every one do in like manner. Then let this thought be in thy mind, Where then are those men? Nowhere, or nobody knows where. For thus continuously thou wilt look at human things as smoke and nothing at all; especially if thou reflectest at the same time that what has once changed will never exist again in the infinite duration of time. But thou, in what a brief space of time is thy existence? And why art thou not content to pass through this short time in an orderly way? What matter and opportunity [for thy activity] art thou avoiding? For what else are all these things, except exercises for the reason, when it has viewed carefully and by examination into their nature the things which happen in life? Persevere then until thou shalt have made these things thy own, as the stomach which is strengthened makes all things its own, as the blazing fire makes flame and brightness out of everything that is thrown into it.

Marcus Aurelius, Meditations 10.31, translated by George Long

Let a glance at Satyron call up the image of Socraticus or Eutyches or Hymen, and a glance at Euphrates the image of Eutychion or Silvanus, and a glance at Alciphron Tropaeophorus, and at Severus Xenophon or Crito. Let a glance at thyself bring to mind one of the Caesars, and so by analogy in every case. Then let the thought strike thee: Where are they now? Nowhere, or none can say where. For thus shalt thou habitually look upon human things as mere smoke and as naught; and more than ever so, if thou bethink thee that what has once changed will exist no more throughout eternity. Why strive then and strain? Why not be content to pass this thy short span of life in becoming fashion?

What material, what a field for thy work dost thou forgo! For what are all these things but objects for the exercise of a reason that hath surveyed with accuracy and due inquiry into its nature the whole sphere of life? Continue then until thou hast assimilated these truths also to thyself, as the vigorous digestion assimilates every food, or the blazing fire converts into warmth and radiance whatever is cast into it.

Marcus Aurelius, Meditations 10.31, translated by C. R. Haines