For day and night thy hand was heavy upon me: my moisture is turned into the drought of summer. Selah.
Ver. 4. For day and night thy hand was heavy upon me] See what God can do when once he taketh a man to do. Day and night he had sinned against God; therefore day and night he suffereth; and glad he may be that he so escapeth, and is not forced to undergo an eternity of extremity. Some think that this psalm and the sixth were made much about a time, when David was recently recovered of some grievous fit of sickness. It may be meant only of his inward terrors, or chiefly, at least; his body suffering by sympathy, as having shared in his sin.
My moisture is turned into the drought of summer] My natural radical moisture, the oil that maintaineth the lamp of life, is dried up and become like a lump of clay; the vigour also and verdure of my soul is quelled and consumed with the fire of thy fierce wrath. God will bring his best people to this if they put him to it; that they shall find it to be the greatest folly in the world to buy the sweetest sin at so dear a rate.
Selah] I speak it feelingly. O quantum tormentum, &c. O aridum et exhaustum me prae maestitia, &c., O my pitiful condition! (Vatablus).