in Thoreau’s Journal:

I have met with but one or two persons in the course of my life who understood the art of taking walks daily, —not [to] exercise the legs or body merely, nor barely to recruit the spirits, but positively to exercise both body and spirit, and to succeed to the highest and worthiest ends by the abandonment of all specific ends…The chivalric and heroic spirit, which once belonged to the chevalier or rider only, seems now to reside in the walker. To represent the chivalric spirit we have no longer a knight, but a walker, errant. I speak not of pedestrianism, or of walking a thousand miles in a thousand successive hours. The Adam who daily takes a turn in his garden. Methinks I would not accept of the gift of life, if I were required to spend as large a portion of it sitting foot up or with my legs crossed, as the shoemakers and tailors do. As well be tied neck and heels together and cast into the sea.