Men are continually in search of some sequestered retreat, some villa on the sea-shore, or on some airy mountain. And you, my friend, were formerly very much attached to retirement. But this is evidently a mere vulgar conception of things. You have it in your power, at any time and in any place, to retire into yourself; and where can a man find a more peaceful or more undisturbed repose than in his own soul? Especially one who, when he looks into his own breast, finds nothing there but a perfect calm; such a calm I mean as arises from order and well-regulated passions and affections.
Marcus Aurelius, Meditations