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

Walking takes longer… than any other known form of locomotion except crawling. Thus it stretches time and prolongs life. Life is already too short to waste on speed. – Edward Abbey, “Walking”

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”