While doing some sermon prep, I ran across these rich comments by Calvin in his treatment of the parable of the Lost Sheep in both Matthew and Luke:

 For the Son of man cometh. Christ now employs his own example in persuading his disciples to honor even weak and despised brethren; for he came down from heaven to save not them only, but even the dead who were lost. It is in the highest degree unreasonable that we should disdainfully reject those whom the Son of God has so highly esteemed. And even if the weak labor under imperfections which may expose them to contempt, our pride is not on that account to be excused; for we ought to esteem them not for the value of their virtues, but for the sake of Christ; and he who will not conform himself to Christ’s example is too saucy and proud.

What think you? Luke carries the occasion of this parable still farther back, as having arisen from the murmurings of the Pharisees and scribes against our Lord, whom they saw conversing daily with sinners. Christ therefore intended to show that a good teacher ought not to labor less to recover those that are lost, than to preserve those which are in his possession; though according to Matthew the comparison proceeds farther, and teaches us not only that we ought to treat with kindness the disciples of Christ, but that we ought to bear with their imperfections, and endeavor, when they wander, to bring them back to the road. For, though they happen sometimes to wander, yet as they are sheep over which God has appointed his Son to be shepherd, so far are we from having a right to chase or drive them away roughly, that we ought to gather them from their wanderings; for the object of the discourse is to lead us to beware of losing what God wishes to be saved. The narrative of Luke presents to us a somewhat different object. It is, that the whole human race belongs to God, and that therefore we ought to gather those that have gone astray, and that we ought to rejoice as much, when they that are lost return to the path of duty, as a man would do who, beyond his expectation, recovered something the loss of which had grieved him.

There will be joy in the presence of the angels. If angels mutually rejoice with each other in heaven, when they see that what had wandered is restored to the fold, we too, who have the same cause in common with them, ought to be partakers of the same joy. But how does he say that the repentance of one ungodly man yields greater joy than the perseverance of many righteous men to angels, whose highest delight is in a continued and uninterrupted course of righteousness? I reply, though it would be more agreeable to the wishes of angels (as it is also more desirable) that men should always remain in perfect integrity, yet as in the deliverance of a sinner, who had been already devoted to destruction, and had been cut off as a rotten member from the body, the mercy of God shines more brightly, he attributes to angels, after the manner of men, a greater joy arising out of an unexpected good.

–Harmony of the Law, Vol. 2, Matthew 18:14; Luke 15:1-10

There is much to comment on in this passage, but I want to call our attention to only a few things:

1. Calvin uses the term ‘saucy’. That’s brilliant.
2. A good teacher both preserves what’s in his possession, and labors to regain what was lost. Many of us in ministry focus on one to the exclusion of the other but Calvin points to the necessity of both for the good shepherd-pastor.
3. The “unexpected good” of repentance ought to cause us great joy. We should love to see steady faithfulness, but the deepest beauty of the Gospel is the recovery of that which was lost–this is what the angels* rejoice over.

Soli Deo Gloria

*Never google for images of angels–ever.