How can you explain that you need to know that the trees are still there, and the hills and the sky? Anyone knows they are. How can you say it is time your pulse responded to another rhythm, the rhythm of the day and the season instead of the hour and the minute? No, you cannot explain. So you walk. – Author unknown, from New York Times editorial, “The Walk,” 25 October 1967

We ought to take outdoor walks, to refresh and raise our spirits by deep breathing in the open air. – Lucius Annaeus Seneca, “On Tranquillity of Mind”

In the morning a man walks with his whole body; in the evening, only with his legs. – Ralph Waldo Emerson