10:1-5 Here is a parable or similitude, taken from the customs of the East, in the management of sheep. Men, as creatures depending on their Creator, are called the sheep of his pasture. The church of God in the world is as a sheep-fold, exposed to deceivers and persecutors. The great Shepherd of the sheep knows all that are his, guards them by his providence, guides them by his Spirit and word, and goes before them, as the Eastern shepherds went before their sheep, to set them in the way of his steps. Ministers must serve the sheep in their spiritual concerns. The Spirit of Christ will set before them an open door. The sheep of Christ will observe their Shepherd, and be cautious and shy of strangers, who would draw them from faith in him to fancies about him.

3. To him the porter openeth—that is, right of free access is given, by order of Him to whom the sheep belong; for it is better not to give the allusion a more specific interpretation [Calvin, Meyer, Luthardt].

and the sheep hear his voice—This and all that follows, though it admits of important application to every faithful shepherd of God's flock, is in its direct and highest sense true only of "the great Shepherd of the sheep," who in the first five verses seems plainly, under the simple character of a true shepherd, to be drawing His own portrait [Lampe, Stier, &c.].