Nowhere can a man find a quieter or more untroubled retreat than in his own soul.

-Aung San Suu Kyi
c.  AD 170^180  Meditations, bk.4, no.3 (translated by M Staniforth).

Il se faut reserver une arriere boutique toute nostre, toute franche, en laquelle nous establissons nostre vraye liberte¤   et principale retraite et solitude. We must reserve a backshop, wholly our own and entirely free, wherein to settle our true liberty, our principle solitude and retreat.

-Montaigne, Michel Eyquem de
  Essais, bk.1, ch.39 (translated by Charles Cotton).

If I advance, follow me. If I retreat, kill me. If I die, avenge me.

-Mussolini, Benito also called Il Duce [the Leader]
  Said to senior officials after an attempt on his life, 6  Apr.

The books one reads in childhood, and perhaps most of all the bad and good bad books, create in one's mind a sort of false map of the world, a series of fabulous countries into which one can retreat at odd moments throughout the rest of life, and which in some cases can even survive a visit to the real countries which they are supposed to represent.

-Orwell, George pseudonym of  Eric Arthur Blair
  'Riding Down from Bangor'.

Let me assert my belief that the only thing that we have to fear is fear itselfönameless, unreasoning, unjustified terror that paralyses needed efforts to convert retreat into advance.

-Roosevelt, Franklin D(elano)
  Inaugural address, 4 Mar.

   A mistress should be like a little country retreat near the town, not to dwell in constantly, but only for a night and away.

-Wycherley,William
  The CountryWife, act1, sc.1.