Retiring to the Mind
They seek for themselves private retiring places, as country villages, the sea-shore, mountains; yea thou thyself art wont to long much after such places. But all this thou must know proceeds from simplicity in the highest degree. At what time soever thou wilt, it is in thy power to retire into thyself, and to be at rest, and free from all businesses. A man cannot any whither retire better than to his own soul; he especially who is beforehand provided of such things within, which whensoever he doth withdraw himself to look in, may presently afford unto him perfect ease and tranquillity. By tranquillity I understand a decent orderly disposition and carriage, free from all confusion and tumultuousness. Afford then thyself this retiring continually, and thereby refresh and renew thyself. Let these precepts be brief and fundamental, which as soon as thou dost call them to mind, may suffice thee to purge thy soul throughly, and to send thee away well pleased with those things whatsoever they be, which now again after this short withdrawing of thy soul into herself thou dost return unto.
Marcus Aurelius, Meditations 49