From Harriet Martineau's still neglected Deerbrook, chapter 25:
The unhappy are indisposed to employment: all active occupations are wearisome and disgusting in prospect, at a time when everything, life itself, is full of weariness and disgust. Yet the unhappy must be employed, or they will go mad. . . . Walking is good,—not stepping from shop to shop, or from neighbour to neighbour; but stretching out far into the country, to the freshest fields, and the highest ridges, and the quietest lanes. . . . The mere breathing of the cool wind on the face in the commonest highway, is rest and comfort which must be felt at such times to be believed. It is disbelieved in the shortest intervals between its seasons of enjoyment: and every time the sufferer has resolution to go forth to meet it, it penetrates to the very heart in glad surprise.