Via Graveyard Masonry:
Of Walks and Walking Tours (London: T. Werner Laurie, 1914), p. 214:
There comes a time when nothing seems worth while; when gaiety palls, and even sorrow dulls instead of stirs; when nothing seems of any use, and one feels inclined to give up, to give up. — To such I would say, pull on thick boots, clutch a stout stick, and go for a country walk — rain or shine. — It sounds a preposterous remedy, but try it. Nature never gives up. Not a pygmy weed, trodden under foot of man, and covered up and overwhelmed with rival growths, but battles for its life with vim. Nor does it ask for what it battles. Neither does it question why more favoured plants are so carefully nurtured, and it, poor thing, is dragged up by the roots. — Take a country walk, and look at the weeds if at nothing else.