To him the porter openeth. The doorkeeper of the fold has been variously interpreted. Bengel and Hengstenberg say, "God himself" is meant; Stier, Alford, and Lange, "the Holy Spirit;" against which interpretations may be urged the subordinate position assigned to the "porter," as compared with the shepherds themselves.
Lampe and Godet think that "John the Baptist" was intended; while Meyer and De Wette say that it is one of those elements of the parable which is dropped out of our Lord's own exposition for which we need not seek any special application.
Westcott thinks it must vary with the special sense attributed to "sheep" and "shepherd," and float we must think of it as "the Spirit working through his appointed ministers in each case." The "doorkeeper," if Christ be himself the "Door," is the keeper of that door—the agency, the ministry, the ordinances by which the excellences and power of Christ were or are manifested.
We are reminded of subsequent use of the imagery in Paul's Epistles (1 Corinthians 16:9; 2 Corinthians 2:12; Colossians 4:3; cf. Acts 14:27); but the full meaning of the phrase is only suggested, and we had better wait for Christ's interpretation of some parts of this allegory.
The context provides a specific filling out, first of one part of the imagery, and secondly of another part of it. The two interpretations are not to be forced at one and the same time upon the parable.
Our Lord continues: And the sheep hear his voice. When a shepherd approaches the door to fetch the folded sheep which belong to him, the porter opens that door for him i.e. a true shepherd who has at heart the interests of the sheep and of their supreme Owner, finds the way made ready for him.
In the fold are many flocks. All the sheep give heed to his voice. He calleth £ his own sheep by name, and leadeth them out. They know a shepherd calls, and then that shepherd addresses his own sheep by name, and he leads these forth into the pasture.
Even in our own pastures the shepherds know each sheep by name. Aristotle ('Hist. Anim.,' John 6:19) tells us the bell-wether knew his name, and obeyed his shepherd. Archdeacon Watkins gives a quotation from Theocritus' 'Idylls,' charmingly illustrating the habit.
The shepherd, by the mere call to his own sheep, would separate them from these which did not belong to him, and lead them forth to their pasture in the wilderness. This method of Oriental life illustrates the function of all true shepherds of men.
It has had many partial fulfillments in the history of the Church and of the world. Daring the period of the old theocratic dispensation, many "thieves and robbers" made havoc of the flock; still there were prophetic and kingly men who, sent by God, found their way to the heart of Israel; many came to know that a prophet had been among them, and they followed him.
It is equally true now, though all the external conditions are changed. The full application of this part of the allegory is only seen when "the good Shepherd" seeketh his sheep; but the meaning of the first picture is obscured by hurrying on to the enlarged and double exposition which Christ gave of the two parts of his own parable, and much is lost by endeavoring to force into a primary exposition of John 10:1-6 the features borrowed from a twofold interpretation of the separate ideas suggested by the composite image.