I am the good shepherd: the good shepherd giveth his life for the sheep.

People's New Testament

10:11 I am the good shepherd. This title, applied to Jehovah in Ps 23:1-6 Eze 34:12, Christ here applies to himself. The mark of the good shepherd is that he giveth his life for his sheep. In that unsettled country the shepherd had often to defend his flock.

Jamieson-Fausset-Brown Bible Commentary

11. I am the good shepherd-emphatically, and, in the sense intended, exclusively so (Isa 40:11; Eze 34:23; 37:24; Zec 13:7).

the good shepherd giveth his life for the sheep-Though this may be said of literal shepherds, who, even for their brute flock, have, like David, encountered "the lion and the bear" at the risk of their own lives, and still more of faithful pastors who, like the early bishops of Rome, have been the foremost to brave the fury of their enemies against the flock committed to their care; yet here, beyond doubt, it points to the struggle which was to issue in the willing surrender of the Redeemer's own life, to save His sheep from destruction.

Matthew Henry's Concise Commentary

10:10-18 Christ is a good Shepherd; many who were not thieves, yet were careless in their duty, and by their neglect the flock was much hurt. Bad principles are the root of bad practices. The Lord Jesus knows whom he has chosen, and is sure of them; they also know whom they have trusted, and are sure of Him. See here the grace of Christ; since none could demand his life of him, he laid it down of himself for our redemption. He offered himself to be the Saviour; Lo, I come. And the necessity of our case calling for it, he offered himself for the Sacrifice. He was both the offerer and the offering, so that his laying down his life was his offering up himself. From hence it is plain, that he died in the place and stead of men; to obtain their being set free from the punishment of sin, to obtain the pardon of their sin; and that his death should obtain that pardon. Our Lord laid not his life down for his doctrine, but for his sheep.