[How to Live, Part 4, pp. 55-62. Published in 1865.]
In no case should sick persons be deprived of a full supply of fresh air in pleasant weather. Their rooms may not always be so constructed as to allow the windows or doors to be opened, without the draft coming directly upon them, thus exposing them to the taking of cold. In such cases windows and doors should be opened in an adjoining room, thus letting fresh air enter the room occupied by the sick. Fresh air will prove far more beneficial to sick persons than medicine, and is far more essential to them than their food. They will do better, and will recover sooner, when deprived of food, than when deprived of fresh air. CH 55.1
Many invalids have been confined for weeks and even for months in close rooms, with the light and the pure, invigorating air of heaven shut out, as if air were a deadly enemy, when it was just the medicine they needed to make them well.... These valuable remedies which Heaven has provided, without money and without price, were cast aside and considered not only as worthless, but even as dangerous enemies, while poisons, prescribed by physicians, were in blind confidence taken. CH 55.2
Thousands have died for want of pure water and pure air who might have lived. And thousands of invalids, who are a burden to themselves and others, think that their lives depend upon taking medicines from the doctors. They are continually guarding themselves against the air and avoiding the use of water. These blessings they need in order to become well. If they would become enlightened and let medicine alone, and accustom themselves to outdoor exercise and to air in their houses, summer and winter, and use soft water for drinking and bathing purposes, they would be comparatively well and happy instead of dragging out a miserable existence. CH 55.3