"I wish, above all things, that thou mayest prosper, and be in health."—3 John, 2.

My dear Sister,

If we feel suitably grateful to him who hath died for us, and washed us from our sins in his own blood, we shall desire to make ourselves useful in his vineyard to the highest degree of which our natures are capable. But, to be so, we must preserve our bodies in a healthy and vigorous state. No farmer would think of employing a weak and sickly man in his field, upon full wages. The nature of the service which God requires of us is such as to call for vigor of body as well as strength of mind. Most of our efforts to benefit our fellow-creatures are attended with labor of body and sacrifices of personal ease. And these efforts are greatly impeded by a feeble state of health. Again, bodily feelings have a great influence upon the mind. When the animal powers are prostrated, the mind almost uniformly suffers with them. Hence, a feeble state of the body may be a very great hindrance to us, in maintaining the Christian warfare. I know that some individuals have lived very devoted lives, and been eminently useful, with frail and sickly bodies. But this does not prove that, with the same degree of faithfulness, and a sound body, they might not have made much higher attainments. If you have read the lives of Brainerd, Martyn, and Payson, I think you will be convinced of this. Yet, I do not say that the affliction of ill health might not have been the means which God used to make them faithful. But if they had been equally faithful, with strong and vigorous bodies, I have no doubt they would have done much more good in the world, and arrived at a much higher degree of personal sanctification. During much of their lives, they were borne down and depressed by feeble health, and they all died in the prime of life. Now, suppose them to have been as devoted as they were, with strong and vigorous constitutions, until they had arrived at the period of old age; might they not have brought forth much more fruit? If so, then God would have been so much more glorified in them; for our Lord says, "Herein is my Father glorified, that ye bear much fruit."

If the foregoing remarks are correct, it then becomes the duty of every Christian to use all proper means to maintain a sound, healthful, and vigorous bodily constitution. And this is much more within the power of every individual than many imagine. It is true, that life, and health, and every blessing, come from God. But he does not give these things without the intervention of second causes. He has made our animal nature subject to certain fixed laws; and even when his own children violate these laws, he will work no miracle to preserve their health or save their lives. I am satisfied that the subject receives far too little attention from Christians in general. In this respect they seem to act upon the supposition that their lives are their own; and that the injury they bring upon their bodies, by imprudence and neglect of proper attention, concerns nobody but themselves. But this is a great mistake. Their lives belong to God. He has bought them with the precious blood of his dear Son. They have dedicated them to his service. They are bound, therefore, to use all proper means for their preservation, that they may be prolonged for the glory of God and the good of their fellow-men.

But when I speak of the means to be used for the preservation of health, I do not intend that excessive attention to remedies, which leads so many people to resort to medicine upon every slight illness. But I mean the study of the laws or principles of our animal existence; and a diligent care to live according to those laws. In short, I mean living according to nature. Probably a large proportion of the diseases to which human life is subject, are the natural consequence of living contrary to nature; or contravening the great laws which govern our present mode of existence.

Within the compass of a single letter, I cannot be very particular on this subject. But I would recommend to you to read approved writers on health, and the structure and constitution of the human body. Try to understand the principles upon which this truly wonderful machine is kept in motion. You will find it a most interesting subject. You will see the evidence of a mighty intellect in its construction. You will also be able to draw from it practical lessons to guide you in the most common concerns of life. I am the more earnest in this recommendation, because I think you will discover that many of those habits and customs of society, which are peculiarly under the control of ladies, need reforming. I am seriously of the opinion that the general health of society depends far more upon the ladies than upon the physicians. The former direct the preparation of the daily supplies of food, designed to sustain, refresh, and keep in motion the human system. The latter can only give prescriptions for regulating this delicate machinery, when, by mismanagement, it has got out of order. I will, however, give you a few simple rules for the preservation of health, which, though incomplete, will be of great benefit, if faithfully pursued. From experience, study, and observation, you will no doubt be able to add to them many improvements.

1. Make attention to health a matter of conscience, as a religious duty. Pray daily that God would give you wisdom and self-denial, that you may be able to avoid whatever is injurious, and to persevere in the judicious use of such means as are necessary to promote sound health and energy of body.

2. Maintain habitual cheerfulness and tranquillity of mind. Few persons are aware of the influence which this has upon the health of the body. If you are subject to melancholy, avoid it, and fight against it as a sin, dishonoring to God, and destructive of your own health and happiness. It is dishonoring to God, because it is calculated to give the world a gloomy and repulsive idea of religion. Nor is this view of the subject at all inconsistent with the exercise of sorrow for sin, and feeling for sinners. Godly sorrow is a melting exercise, which softens the heart, and brings it low before God: while a sight of the cross of Christ, and a sense of pardoning love, bring a holy calm and heavenly peace over all the soul. But despondency comes over us like the withering blasts of winter. It congeals the tender emotions of the heart, and casts an icy gloom over every object. It hides from our view everything lovely. It makes us insensible to the mercies of God which he is daily lavishing upon us. It shuts up the soul to brood alone, over everything dark and hideous. It is no less unfriendly to the exercise of holy affections than levity of conversation and manners. Although often created by bodily infirmity, it reacts, and renders disease doubly ferocious. Yet it is so far under the control of the will, that grace will enable us to subdue it. There is a very intimate connection between the mind and body. The one acts upon the other. Depression of spirits enfeebles all the animal powers; and particularly disturbs digestion, thereby deranging the whole system. If, therefore, you ever feel a gloomy depression of spirits, try to bring your mind into a serene and grateful frame, by meditating on the mercies you enjoy, and exercising a cheerful submission to the will of God. Remember that God directs all your ways, and that you have just as much of every comfort and blessing as he sees fit to give you, and infinitely more than you deserve. Rise above yourself, and think of the infinite loveliness of the divine character. But, if this is not sufficient, walk out and view the works of Nature; and try to forget yourself in contemplating the wisdom and glory of God, as manifest in them; and the bodily exercise will assist in driving-away this disturber of your peace. Or, seek the society of some Christian friend, who is not subject to depression of spirits, and converse about those heavenly truths which are calculated to call forth the exercise of love, joy, and gratitude, and make you lose sight of yourself in the fulness and glory of God. Any violent emotion of the mind, or exercise of strong passions of any kind, is likewise exceedingly injurious to the health of the body.

3. Be REGULAR in all your habits. Ascertain, as nearly as you can, from your own feelings and experience, how many hours of sleep you require. No general rule can be adopted, on this subject. Some people need more sleep than others. The want of sleep, and excessive indulgence in it, alike operate to enervate both body and mind. Probably every constitution may be safely brought between five and eight hours. Of this you will judge by making a fair trial. That period of sleep which renders both body and mind most energetic and vigorous, should be adopted. But, if possible, take all your sleep in the night. Fix upon an hour for retiring, and an hour for rising, and then conscientiously keep them. Let nothing but stern necessity tempt you to vary from them in a single instance; for you may not be able in a week to recover from the effects of a single derangement of your regular habits. We are the creatures of habit; but if we would control our habits, instead of suffering them to control us, it would be greatly to our advantage. It is also important that the hours of retiring and rising should be early. Upon the plan proposed, early retiring will be necessary to early rising, which is a matter of the first importance. Early rising promotes cheerfulness; invigorates the system; and in many other ways contributes to health. It also assists devotion. There is a solemn stillness before the dawn of day, in a winter morning, peculiarly favorable to devotional feelings; and nothing is better calculated to fill the mind with grateful and adoring views of the beneficence of the Creator, than the refreshing sweetness of a summer morn. Whoever sleeps away this period, loses half the pleasures of existence. To sally forth and enjoy the calmness and serenity of such a season; to listen to the sweet warbling of the birds; to behold the sparkling dew-drops, and the gayety of the opening flowers, as all nature smiles at the approach of the rising sun; to join the music of creation, in lifting up a song of softest, sweetest melody, in praise of their great Author, is no common luxury.

4. Spend at least two hours every day in active exercise in the open air. This time may be divided into such portions as you find most convenient. The proper seasons for exercise are, about an hour either before or after a meal. This you may do without regard to the weather, provided you observe the following precautions, when it is cold, damp, or wet:—1. Exert yourself sufficiently to keep moderately warm. 2. Do not stop on your way, to get chilled. 3. On returning, change any garment that may be wet or damp, before sitting down. This course will not only keep up your regular habits, but produce a hardiness of constitution which will greatly increase your usefulness in life. It is a great mistake to suppose that exposure to a damp, vapory atmosphere is injurious to health. The danger lies in exposing yourself when the system is in a relaxed state, as it is during rest, after exercise. But, while a general action is kept up, by vigorous exercise, nature itself will resist the most unfriendly vapors of the atmosphere. There is a great and growing evil in the education of ladies of the middling and higher classes, at the present day. The tender and delicate manner in which they are bred, enfeebles their constitutions, and greatly diminishes their usefulness, in every station of life. Many of them are sickly, and few of them are able to endure the slightest hardships. To show that this is the fault of their education, we need only to refer to the condition of those young women whose circumstances in life render it necessary for them to labor. In most cases they possess hale and vigorous constitutions, and are even more capable of enduring hardships than most men of sedentary habits. There may be some exceptions to this remark; but if these cases were examined, we should doubtless find that the laws of nature have been, in some other respects, transgressed. I do not see how this delicate training can be reconciled with Christian principle. If we have devoted ourselves to the Lord, it is our duty not only to do all the good we can in this world, but to make ourselves capable of doing as much as possible. The man in the parable was condemned for not improving and increasing his talent. Anything, then, which has a tendency to diminish our usefulness, should be regarded as sin.