Observe, 1. Those that are of a slothful disposition, that love their ease and cannot apply their minds to any business, are not fit to be employed, no, not so much as to be sent on an errand, for they will neither deliver a message with any care nor make any haste back. Such therefore are very unmeet to be ministers, Christ's messengers; he will not own the sending forth of sluggards into his harvest. 2. Those that are guilty of so great an oversight as to entrust such with any affair, and put confidence in them, will certainly have vexation with them. A slothful servant is to his master as uneasy and troublesome as vinegar to the teeth and smoke to the eyes; he provokes his passion, as vinegar sets the teeth on edge, and occasions him grief to see his business neglected and undone, as smoke sets the eyes a weeping.

As vinegar to the teeth,.... Which, with its coldness and sourness, blunts the teeth, and makes it troublesome to eat: the Septuagint, Syriac, and Arabic versions, render it,

"as the sour grape is hurtful to the teeth;''

sets them on edge;

and as smoke to the eye; dims the sight, causes the eye to water, and is very pernicious and vexatious:

so is the sluggard to them that send him: that is, the slothful messenger, as the Targum explains it; who, being sent on an errand, is dilatory, does not make haste to bring back the answer; which is very vexatious to those that send him, raises their passions, makes them fretful and very angry, be it on what account it will: so slothful and unprofitable servants, to whom talents are given for usefulness, which they hide or use not, are very provoking to Christ, and whom he will order into outer darkness; those who have gifts for sacred service ought not to be slothful in business, but fervent in spirit, serving the Lord, Mat 25:26.

that is, causes vexation.