Psalms 107:20

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.

He sent his word and healed them. Man is not healed by medicine alone, but by the word which proceedeth out of the mouth of God is man restored from going down to the grave. A word will do it, a word has done it thousands of times. And delivered them from their destructions. They escape though dangers had surrounded them, dangers many and deadly. The word of the Lord has a great delivering power; he has but to speak and the armies of death flee in an instant. Sin sick souls should remember the power of the Word, and be much in hearing it and meditating upon it. Spiritually considered, these verses describe a sin sick soul: foolish but yet aroused to a sense of guilt, it refuses comfort from any and every quarter, and a lethargy of despair utterly paralyses it. To its own apprehension nothing remains but utter destruction in many forms: the gates of death stand open before it, and it is, in its own apprehension, hurried in that direction. Then is the soul driven to cry in the bitterness of its grief unto the Lord, and Christ, the eternal Word, comes with healing power in the direst extremity, saving to the uttermost.