7. _As much as possible avoid taking medicine._ The practice of resorting to _remedies_ for every unpleasant feeling cannot be too strongly reprobated. Medicine should be regarded as a choice of two evils. It may throw off a violent attack of disease, and save life; but it must inevitably, in a greater or less degree, impair the constitution. Medicine is unfriendly to the human system. Its very effect, which is to disturb the regular operation of the animal functions, proves this. But, when violent disease is seated upon any part, this may be necessary; and the injury received from the medicine may not bear any comparison with the consequences which would follow, if the disease were left to take its course. In such cases, the physician should be called immediately, as delay may be fatal. But the great secret lies in avoiding such attacks, by a scrupulous attention to the laws of nature. Such attacks may generally be traced either to violent colds, or the interruption of some of the regular functions of the body. The most important of these may, with proper attention, be brought almost entirely under the control of _habit_; and all of them may generally be preserved in healthy action, by proper attention to diet and exercise. But careless and negligent habits, in these respects, will ruin the most hardy constitution, and bring on a train of disorders equally detrimental to mind and body. But, in most cases of moderate, protracted disease, a return to the regular system of living _according to nature_ will gradually restore lost health. Or, in other words, a strict examination will discover some violation of the principles of the human constitution, as the cause of derangement; and by correcting this error, nature will gradually recover its lost energies, and restore soundness to the part affected. Your affectionate Brother. LETTER XI. _Mental Cultivation. Reading._ MY DEAR SISTER,