Men seek retreats for themselves - in the country, by the sea, in the hills - and you yourself are particularly prone to this yearning. But all this is quite unphilosophic, when it is open to you, at any time you want, to retreat into yourself. No retreat offers someone more quiet and relaxation than that into his own mind, especially if he can dip into thoughts there which put him at immediate and complete ease: and by ease I simply mean a well-ordered life. So constantly give yourself this retreat, and renew yourself. The doctrines you will visit there should be few and fundamental, sufficient at one meeting to wash away all your pain and send you back free of resentment at what you must rejoin. And what is it you will resent? Human wickedness? Recall the conclusion that rational creatures are born for each other's sake, that tolerance is a part of justice, that wrongdoing is not deliberate. Consider the number of people who spent their lives in enmity, suspicion, hatred, outright war, and were then laid out for burial or reduced to ashes. Stop, then. Or will you fret at your allocation from the Whole? Revisit the alternatives -providence or atoms - and the many indications that the universe is a kind of community. But will matters of the flesh still have their hold on you? Consider that the mind, once it has abstracted itself and come to know its own defining power, has no contact with the movement of the bodily spirit, be that smooth or troubled: and finally remember all that you have heard and agreed about pain and pleasure. Well then, will a little fame distract you? Look at the speed of universal oblivion, the gulf of immeasurable time both before and after, the vacuity of applause, the indiscriminate fickleness of your apparent supporters, the tiny room in which all this is confined. The whole earth is a mere point in space: what a minute cranny within this is your own habitation, and how many and what sort will sing your praises here! Finally, then, remember this retreat into your own little territory within yourself. Above all, no agonies, no tensions. Be your own master, and look at things as a man, as a human being, as a citizen, as a mortal creature. And here are two of the most immediately useful thoughts you will dip into. First that things cannot touch the mind: they are external and inert; anxieties can only come from your internal judgement. Second, that all these things you see will change almost as you look at them, and then will be no more. Constantly bring to mind all that you yourself have already seen changed. The universe is change: life is judgement.
~ Meditations, Book IV