We are all of us the slaves of external circumstance: even at a table in some backstreet café, a sunny day can open up before us visions of wide fields; a shadow over the countryside can cause us to shrink inside ourselves, seeking uneasy shelter in the doorless house that is our self; and, even in the midst of daytime things, the arrival of darkness can open out, like a slowly spreading fan, a deep awareness of our need for rest.
