Psalms 107:18

If we knew no sin, we should know no sickness. Sinners are fools. They hurt their bodily health by intemperance, and endanger their lives by indulging their appetites. This their way is their folly. The weakness of the body is the effect of sickness. It is by the power and mercy of God that we are recovered from sickness, and it is our duty to be thankful. All Christ's miraculous cures were emblems of his healing diseases of the soul. It is also to be applied to the spiritual cures which the Spirit of grace works. He sends his word, and heals souls; convinces, converts them, makes them holy, and all by the word. Even in common cases of recovery from sickness, God in his providence speaks, and it is done; by his word and Spirit the soul is restored to health and holiness.

Their soul abhorreth all manner of meat. Appetite departs from men when they are sick: the best of food is nauseous to them, their stomach turns against it. And they draw near unto the gates of death. From want of food, and from the destructive power of their malady, they slide gradually down till they lie at the door of the grave; neither does the skill of the physician suffice to stay their downward progress. As they cannot eat there is no support given to the system, and as the disease rages their little strength is spent in pain and misery. Thus it is with souls afflicted with a sense of sin, they cannot find comfort in the choicest promises, but turn away with loathing even from the gospel, so that they gradually decay into the grave of despair. The mercy is that though near the gates of death they are not yet inside the sepulchre.