It is with this modified form of sun-bath (not because the sun-bath, as a treatment, is anything but admirable, but because it is in treatment of disease that it is mainly used) that we have to deal. Everyone knows how invigorating it is to have only the face and hands exposed to the sun, a twentieth part of the body, that is to say, given the sun-bath, not as a medicine, but as a sustainer of general health. Multiply this by twenty then: instead of twenty minutes in the open air, expose the whole body, if possible, when dressing, to direct sun-rays by an open window; let the fresh air and the sun “have their sweet way.” Sunlight, it is sadly true, is not always available, but light is better than no light, and instead of hastening to dress after the bath in the morning, throw the windows wide, and for as long as may be (though taking a feeling of chilliness as a danger signal of Nature, indicating clothes) let your body drink in light and air. If you are of imperfect circulation, get warm first by a hot-bath and exercise, but remember that as long as you are warm, there is no conceivable danger of catching cold, and that on the first hint of cold you are almost certainly in time to dress. Also the endurance of exposure increases rapidly, and endurance of exposure is one of the first requisites of serene health, of the health that no more bothers itself about danger of catching cold than the enviable slumberer spoken of in the chapter on sleep bothers himself about getting to sleep. No wonder the sun in Greek times was the god Apollo, the young god of health and beauty, of all that keeps men young and vigorous, of all that keeps them sane and efficient. No wonder, also, that from time immemorial the sun has been worshipped as the supreme god, for from what else but his light comes growth and health? There he is every day (or at any rate on some days) marching slowly for our behoof across a beneficent heaven, and we are like children who clench their teeth when the doctor comes, rather than show their tongue, if we strive by awnings and parasols, and God knows what infamous devices, to shut out that humane physician. Gentlemen, “The Sun.”