Ursula K. Le Guin said this quote

This was a great magic. Festin had no more performed it than has any man who in exile or danger longs for the earth and waters of his home, seeing and yearning over the doorsill of his house, the table where he has eaten, the branches outside the window of the room where he has slept. Only in dreams do any but the great Mages realize this magic of going home.