Men seek retreats for themselves,
houses in the country,
sea-shores, and mountains;
and thou too art wont to desire such things very
much.
But this is altogether a mark of the most common sort of men,
for it is
in thy power whenever thou shalt choose to retire into thyself.
For nowhere
either with more quiet or more freedom from trouble
does a man retire than into
his own soul.
Marcus Aurelius, Meditations,
Book IV