Though thou shouldst be going to live three thousand years, and as many times ten thousand years, still remember that no man loses any other life than this which he now lives, nor lives any other than this which he now loses. The longest and shortest are thus brought to the same. For the present is the same to all, though that which perishes is not the same; and so that which is lost appears to be a mere moment. For a man cannot lose either the past or the future: for what a man has not, how can any one take this from him? These two things then thou must bear in mind; the one, that all things from eternity are of like forms and come round in a circle, and that it makes no difference whether a man shall see the same things during a hundred years or two hundred, or an infinite time; and the second, that the longest liver and he who will die soonest lose just the same. For the present is the only thing of which a man can be deprived, if it is true that this is the only thing which he has, and that a man cannot lose a thing if he has it not.
I consist of a little body and a soul. Now to this little body all things are indifferent, for it is not able to perceive differences. But to the understanding those things only are indifferent, which are not the works of its own activity. But whatever things are the works of its own activity, all these are in its power. And of these however only those which are done with reference to the present; for as to the future and the past activities of the mind, even these are for the present indifferent.
Do not disturb thyself by thinking of the whole of thy life. Let not thy thoughts at once embrace all the various troubles which thou mayest expect to befall thee: but on every occasion ask thyself, What is there in this which is intolerable and past bearing? For thou wilt be ashamed to confess. In the next place remember that neither the future nor the past pains thee, but only the present. But this is reduced to a very little, if thou only circumscribest it, and chidest thy mind, if it is unable to hold out against even this.
All those things at which thou wishest to arrive by a circuitous road, thou canst have now, if thou dost not refuse them to thyself. And this means, if thou wilt take no notice of all the past, and trust the future to providence, and direct the present only conformably to piety and justice. Conformably to piety, that thou mayest be content with the lot which is assigned to thee, for nature designed it for thee and thee for it. Conformably to justice, that thou mayest always speak the truth freely and without disguise, and do the things which are agreeable to law and according to the worth of each.