People look for retreats for themselves, in the country, by the coast, or in the hills; and you too are especially inclined to feel this desire. But this is altogether unphilosophical, when it is possible for you to retreat into yourself at any time you want.
There is nowhere that a person can find a more peaceful and trouble-free retreat than in his own mind, especially if he has within himself the kind of thoughts that let him dip into them and so at once gain complete ease of mind; and by ease of mind, I mean nothing but having one’s own mind in good order. So constantly give yourself this retreat and renew yourself.
You should have at hand concise and fundamental principles, which will be enough, as soon as you encounter them, to cleanse you from all distress and send you back without resentment at the activities to which you return.Marcus Aurelius