Abuse of lawful things
Another reason or ground of fasting is this. Many of those who now fear God are deeply sensible how often they have sinned against him by the abuse of these lawful things. They know how much they have sinned by excess of food, how long they have transgressed the holy law of God with regard to temperance, if not sobriety too, how they have indulged their sensual appetites, perhaps to the impairing even of their bodily health, certainly to the no small hurt of their soul. For by this they continually fed and increased that sprightly folly, that airiness of mind, that levity of temper, that gay inattention to things of the deepest concern, that giddiness and carelessness of spirit, which were no other than drunkenness of soul, which stupefied all their noblest faculties no less than excess of wine or strong drink. To remove therefore the effect, they remove the cause. They keep at a distance from all excess. They abstain as far as is possible from what had nearly plunged them into everlasting perdition. They often wholly refrain, always take care to be sparing and temperate in all things.
1771 text
3. *Another reason or ground of fasting is this. Many of those who now fear God, are deeply sensible how often they have sinned against him, by the abuse of these lawful things. They know, how much they have sinned by excess of food; how long they have transgrest the holy law of God, with regard to temperance, if not sobriety too: how they have indulged their sensual appetites, perhaps to the impairing even their bodily health; certainly to the no small hurt of their soul. For hereby they continually fed and increased that sprightly folly, that airiness of mind, that levity of temper, that gay inattention to things of the deepest concern, that giddiness and carelessness of spirit, which were no other than drunkenness of soul, which stupified all their noblest faculties, no less than excess of wine or strong drink. To remove therefore the effect, they remove the cause: they keep at a distance from all excess. They abstain, as far as is possible, from what had well nigh plunged them in everlasting perdition. They often wholly refrain; always take care to be sparing and temperate in all things.