I am the good shepherd. — The central point of the allegory has now passed from the “Door,” through the last verse as the connecting-link, to the “Good Shepherd.” If we think that the whole discourse was suggested by a scene actually occurring (comp. Note on John 10:1), then the prominence of an actual shepherd passing before them would suggest the turn which it now takes.
The word “good” means that which is fair, and is in a physical sense that which is in its own nature excellent, and in a moral sense that which is beautiful and noble. St. John uses the word only in John 2:10, of the “good wine,” and in this chapter here and in John 10:14; John 10:32-33. (Comp. Note on Luke 8:15.) The passage of the Old Testament referred to above has prepared our minds for this thought of Christ, especially Psalms 23; Isaiah 40:11; Ezekiel 34:11-16; Ezekiel 34:23; Ezekiel 37:24. He is the Shepherd who is ideally good, fulfilling every thought of guidance, support, self-sacrifice that had ever gathered round the shepherd’s name. No image of Christ has so deeply impressed itself upon the mind of the Church as this has. We find it in the earliest Christian literature, as in Tertullian (Works, vol. i., p. 371, in Ante-Nicene Library), or Clement of Alexandria (Works, vol. i., pp. 149, 462, A.N. Lib.). We find it in the very earliest efforts of Christian art, in painting, embroidery, and even statuary. (See Kugler’s Handbook, Italian Schools, Lady Eastlake’s Trans., 4th Ed., pp. 5 and 6.) It comes to us naturally in our hymns and prayers. The pastoral staff is the fit emblem of the Bishop’s work, and the Pastor is the name by which the humble way-side flock thinks of him who in Christ’s name is appointed to be their guide.
Giveth his life for the sheep. — This was true of the actual shepherds, of whose devoted bravery many instances are told. A striking one is that of David himself who rescued the lamb of his father’s flock from the mouth of the lion and the bear (1 Samuel 17:34-37). That self-sacrifice that would lead the shepherd to risk his own life for that of his flock has its ideal fulfilment in Him who is the Good Shepherd, and will give His life for mankind. The word rendered “giveth is life,” should be almost certainly layeth down His life. They are found only in St. John’s writings. The other passages are John 10:15; John 10:17-18; John 13:37-38; John 15:13; 1 John 3:16 (twice).