1. Consider, sinners, whether you are not under a great mistake, while you say, that you obey all the dictates of nature when you rush on to fleshly iniquities. Have you no natural conscience within you that forbids these vile practices? Has it not given you many a check already, and many an inward reproach? Have you no reason that tells you there is a God, and a judgment, and a terrible account one day to be given of the guilt and madness which you now indulge? It is but one part of your nature then, and that the meanest and the vilest too, whose dictates you obey, when you give yourselves up to all intemperance. The very heathens have such a conscience in them, such _a law written in their hearts_, to forbid, and to condemn the grosser iniquities; Rom. ii. 15. And such an inward monitor belongs to your nature too, unless you have entirely subdued and enslaved your spirits, which are the best part of your natures, to the tyranny of your flesh; unless you have buried your reason in brutal appetite, and _seared_ your _conscience as with a hot iron_, that they may neither feel nor speak. 2. You say, it is nature you obey, while you follow after fleshly lusts; but is it not nature depraved and spoiled? Can you think it is the pure, the original and uncorrupted nature of man to follow all the appetites of flesh and blood, and live upon a level with _the brutes that perish_? Can you imagine that your spirit and reason, and all the glorious powers of your intellectual nature in their first perfection, were made to be thus employed as lackeys to the body, and mere purveyors to the flesh? Is it not a sign your nature is fallen from its original state, while these meaner powers of sense and passion have so mighty and sovereign an influence; and is it not rather the dictate of reason, and nature; and true self-love, that you should seek the recovery of your original excellencies, that you should use all methods to stop and heal the diseases of your nature, and to repair these ruins of humanity.