Many suffer decayed vegetable matter to remain about their premises. They are not awake to the influence of these things. There is constantly arising from these decaying substances an effluvia that is poisoning the air. By inhaling the impure air, the blood is poisoned, the lungs become affected, and the whole system is diseased. Disease of almost every description will be caused by inhaling the atmosphere affected by these decaying substances. {4aSG 141.1}
Families have been afflicted with fevers, some have died, and the remaining portion of the family circle have almost murmured against their Maker because of their distressing bereavements, when the sole cause of all their sickness and death has been the result of their own carelessness. The impurities about their own premises have brought upon them contagious diseases, and the sad afflictions which they charge upon God. Every family that prizes health should cleanse their houses and their premises of all decaying substances. {4aSG 141.2}

Many do not realize the necessity of light, and pure air in their houses in order to have health. Some build houses, and furnish them expensively, more to gratify pride, and to receive visitors, than for the comfort, convenience and health of their families. The best rooms are kept dark. The light and air are shut out, lest the light of heaven may injure the rich furniture, fade the carpets, or tarnish the picture frames. When visitors are permitted to be seated in these precious rooms, they are in danger of taking cold, because of the cellar-like atmosphere pervading them. Parlor chambers and bedrooms are kept closed in the same manner and for the same reasons. And whoever occupies these beds which have not been freely exposed to the light and air, do so at the expense of health, and often even of life itself. {4aSG 142.1}
Rooms that are not exposed to light and air become damp. Beds and bedding gather dampness, and the atmosphere in these rooms is poisonous, because it has not been purified by light and air. Various diseases have been brought on by sleeping in these fashionable health-destroying apartments. Every family who prizes health above the empty applause of fashionable visitors, will have a circulation of air, and an abundance of light through every apartment of their houses for several hours each day. But many will follow fashion so closely, they become slaves to it, and would suffer sickness, and even death, rather than be out of the fashion. They will reap that which they have sown. They will live fashionably, and suffer with diseases as the result, be doctored with fashionable poisons, and die fashionable deaths. {4aSG 142.2}
Sleeping rooms especially should be well ventilated, and the atmosphere made healthy by light and air. Blinds should be left open several hours each day, the curtains put aside, and the room thoroughly aired. Nothing should remain, even for a short time, which would destroy the purity of the atmosphere. {4aSG 142.3}
Many families suffer with sore throat, and lung diseases, and liver complaints, brought upon them by their own course of action. Their sleeping rooms are small, unfit to sleep in for one night, but they occupy the small unhealthy apartments for weeks and months, and years. They keep their windows and doors closed, fearing they should take cold if there was a crevice open to let in the air. They breathe the same air over and over, until it becomes impregnated with the poisonous impurities, and waste matter, thrown off from their bodies, through the lungs, and the pores of the skin. Such can test the matter, and be convinced of the unhealthy air in their close rooms, by entering them after they have remained awhile in the open air. Then they can have some idea of the impurities they have conveyed to their blood, through the inhalations of the lungs. Those who thus abuse their health, must suffer with disease. All should regard light and air as among Heaven’s most precious blessings. They should not shut out these blessings as though they were enemies. {4aSG 143.1}
Sleeping apartments should be large, and so arranged as to have a circulation of air through them, day and night. Those who have excluded the air from their sleeping rooms, should commence to change their course immediately. They should let in air by degrees, and increase the circulation until they can bear it day and night, winter and summer, with no danger of taking cold. The lungs, in order to be healthy, must have pure air. {4aSG 143.2}
Those who have not had a free circulation of air in their rooms through the night, generally awake feeling exhausted, feverish, and know not the cause. It was air, vital air, that the whole system required, but which it could not obtain.

Shade trees and shrubbery too close and dense around a house are unhealthy; for they prevent a free circulation of air, and prevent the rays of the sun from shining sufficiently through. In consequence of this, a dampness gathers in the house. Especially in wet seasons the sleeping rooms become damp, and those who sleep in the beds are troubled with rheumatism, neuralgia, and lung complaints, which generally end in consumption. Numerous shade trees cast off many leaves, which, if not immediately removed, decay, and poison the atmosphere. A yard beautified with scattering trees, and some shrubbery, at a proper distance from the house, has a happy, cheerful influence upon the family, and, if well taken care of, will prove no injury to health. Dwellings, if possible, should be built upon high and dry ground. If a house be built where water settles around it, remaining for a time, and then drying away, a poisonous miasma arises, and fever and ague, sore throat, lung diseases, and fevers, will be the result. {4aSG 144.1}
Many have expected that God would keep them from sickness merely because they have asked him to do so. But God did not regard their prayers, because their faith was not made perfect by works. God will not work a miracle to keep those from sickness who have no care for themselves, but are continually violating the laws of health, and make no efforts to prevent disease. When we do all we can on our part to have health, then may we expect that the blessed results will follow, and we can ask God in faith to bless our efforts for the preservation of health. He will then answer our prayer, if his name can be glorified thereby. But let all understand that they have a work to do. God will not work in a miraculous manner to preserve the health of persons who are taking a sure course to make themselves sick, by their careless inattention to the laws of health.