A sea captain when he stands upon the bridge, or looks out from his deck-house, thinks much about God and about the world. Away in the valley yonder among the corn and the poppies men may well forget all things except the warmth of the sun upon the face, and the kind shadow under the hedge; but he who journeys through storm and darkness must needs think and think.

The Collected Works of William Butler Yeats (ed. 1908)