13. The body must be kept in that condition (as far as we can) that is fittest for the service of the soul: as you keep your horse, neither so pampered as to be unruly, nor yet so low as to disable him for travel; but all that health and strength which makes it not unruly, maketh it the more serviceable. It is not the life of the body, but the health and the cheerfulness, which maketh it fit for duty. And so much pleasing of the flesh as tendeth but to its health and cheerfulness, is a duty, where it can be done without greater hurt the other way. A heavy body is but a dull and heavy servant to the mind; yea, a great impediment to the soul in duty, and a great temptation to many sins; as sickly and melancholy persons, and many dull and phlegmatic people, know by sad experience. It is as great a duty to help the body to its due alacrity and fitness for service, as it is to tame it, and bring it under by fasting and sackcloth, when it is proud or lustful.[279] And they that think fasting on certain days, in a formal manner, is acceptable to God, when the state of the body is not helped, but rather hurt and hindered by it, as if it were a thing required for itself, do mistakingly offer a sacrifice to God, which he requireth not; and take him to be an enemy to man, that desireth his pain and grief, when it tendeth not to his good. A mower that hath a good scythe will do more in a day, than another that hath a bad one can do in two: every workman knoweth the benefit of having his tools in order; and every traveller knows the difference between a cheerful and a tired horse; and they that have tried health and sickness, know what a help it is in every work of God, to have a healthful body, and cheerful spirits, and an alacrity and promptitude to obey the mind. When the sights of prospects, and beauteous buildings, and fields, and countries, or the use of walks, or gardens, do tend to raise the soul to holy contemplation, to admire the Creator, and to think of the glory of the life to come (as Bernard used his pleasant walks); this delight is lawful, if not a duty, where it may be had. So when music doth cheer the mind, and fit it for thanks and praise to God: and when the rest of the body, and the use of your best apparel, and moderate feasting, on the Lord's day, and other days of thanksgiving, do promote the spiritual service of the day, they are good and profitable; but to those that are more hindered by fulness, even abstinence on such days is best. So that the use of the body must be judged of as it is a means or an expression of the good or evil of the mind.
14. Sometimes the present time must be most regarded herein, and sometimes the future. For when some great sin, or judgment, or other reason calls us to a fast, when it becomes needful to the ends of that present day, we must do it, though the body were so weak that it would be somewhat the worse afterward; so be it that the good which we may expect by it that day, be greater than the good which it is like to deprive us of afterward: otherwise the after-loss, if greater, is more to be avoided.
15. Many things do remotely fit us for our main end, which, nearly and directly, seem to have no tendency to it; as those that are only to furnish us with natural strength, and vigour, and alacrity, or to prevent impediments. As a traveller's hood and cloak, and other carriage, seem rather to be hinderances to his speed; but yet are necessary for preventing the cold and wet, which else might hinder him more. Yea, a possible, uncertain danger or impediment, if great, may be prevented with a certain small impediment. So it is meet that our bodies be kept in that health and alacrity, which is ordinarily necessary to our duty; and in eating and drinking, and lawful recreations, it is not only the next or present duty, which we prepare for, but for the duty which may be very distant.
16. Ordinarily it is safest to be more fearful of excess of fleshly pleasure, than of defect. For ordinarily we are all very prone to an excess, and also the excess is usually more dangerous. When excess is the damnation of all, or most that ever perish, and defect is but the trouble and hinderance, but never, or rarely, the damnation of any, it is easy then to see on which side we should be most fearful, cautelous, and vigilant.