Laudator Temporis Acti

Henry David Thoreau, Journal (December 29, 1856):

We must go out and re-ally ourselves to Nature every day. We must make root, send out some little fibre at least, even every winter day. I am sensible that I am imbibing health when I open my mouth to the wind. Staying in the house breeds a sort of insanity always. Every house is, in this sense, a sort of hospital. A night and a forenoon is as much confinement to those wards as I can stand. I am aware that I recover some sanity, which I had lost, almost the instant that I come abroad.

Walt Whitman, A Sun Bath—Nakedness, from Specimen Days:

Shall I tell you, reader, to what I attribute my already much-restored health? That I have been almost two years, off and on, without drugs and medicines, and daily in the open air. Last summer I found a particularly secluded little dell off one side by my creek, originally a large dug-out marl-pit, now abandon'd, fill'd with bushes, trees, grass, a group of willows, a straggling bank, and a spring of delicious water running right through the middle of it, with two or three little cascades. Here I retreated every hot day, and follow it up this summer. Here I realize the meaning of that old fellow who said he was seldom less alone than when alone. Never before did I get so close to Nature; never before did she come so close to me.