I will give unto thee the keys of the kingdom of heaven. — Two distinct trains of figurative thought are blended in the words that follow. (1.) The palace of a great king implied the presence of a chief officer, as treasurer or chamberlain, or to use the old Hebrew phrase, as “over the household.” And of this, as in the case of Eliakim, the son of Hilkiah (Isaiah 22:22), the key of office, the key of the gates and of the treasure, was the recognised symbol. In the highest sense that key of the house of David belonged to Christ Himself as the King. It was He who opened and none could shut, who shut and none could open (Revelation 3:7). But that power was now delegated to the servant whose very name, as an Apostle, marked him out as his Lord’s representative, and the after history of Peter’s work, when through him God “opened the door of faith unto the Gentiles” (Acts 14:27; Acts 15:7), was the proof of his faithful discharge of the office thus assigned to him. (2.) With this there was another thought, which in the latter clause of the verse becomes the dominant one. The scribes of Israel were thought of as stewards of the treasures of divine wisdom (Matthew 13:52). When they were admitted to their office they received, as its symbol, the “key of knowledge” (Luke 11:52), which was to admit them to the treasure-chambers of the house of the interpreter, the Beth-Midrash of the Rabbis. For this work the Christ had been training His disciples, and Peter’s confession had shown that the training had so far done its work. He was qualified to be a “scribe instructed unto the kingdom of heaven, and to bring forth out of its treasures things new and old” (Matthew 13:52); and now the “key” was given to him as the token of his admission to that office. It made him not a priest (that office lay altogether outside the range of the symbolism), but a teacher and interpreter. The words that follow as to “binding” and “loosing” were the formal confirmation in words of that symbolic act. For they, too, belong to the scribe’s office and not the priest’s, and express an entirely different thought from that of retaining and forgiving sins. That power was, it is true, afterwards bestowed on Peter and his brother-apostles (see Note on John 20:23), but it is not in question here. As interpreted by the language which was familiar to the Jews (see Lightfoot, Hor. Hebr., on this verse), the words pointed primarily to legislative or interpretative functions, not to the judicial treatment of individual men. The school of Shammai, e.g., bound when it declared this or that act to be a transgression of the Sabbath law, or forbade divorce on any but the one ground of adultery; the school of Hillel loosed when it set men free from the obligations thus imposed. Here, too, the after-work of Peter was an illustration of the meaning of the words. When he resisted the attempt of the Judaisers to “put a yoke upon the neck of the disciples” (Acts 15:10), he was loosing what was also loosed in heaven. When he proclaimed, as in his Epistle, the eternal laws of righteousness, and holiness, and love, he was binding those laws on the conscience of Christendom. It must be remembered, lastly, that the power thus bestowed on him was conferred afterward (Matthew 18:18) on the whole company of the Apostles, or, more probably, on the whole body of the disciples in their collective unity, and there with an implied extension to partially judicial functions (see Note on Matthew 18:18).
A few words will, it is believed, be sufficient to set the claims and the controversies which have had their starting point in these words on their right footing. It may be briefly noted (1) that it is at least doubtful (not to claim too much for the interpretation given above) whether the man Peter was the rock on which the Church was to be built; (2) that it is doubtful (though this is not the place to discuss the question) whether Peter was ever in any real sense Bishop of the Church of Rome, or in any way connected with its foundation; (3) that there is not a syllable pointing to the transmission of the power conferred on him to his successors in that supposed Episcopate; (4) as just stated, that the power was not given to him alone, but equally to all the disciples; (5) that the power of the keys, no less than that of “binding” and “loosing,” was not sacerdotal, but belonged to the office of a scribe or teacher. As a matter of interpretation, the Romish argument from this verse stands on a level with that which sees the supremacy of the successors of St. Peter in the “two great lights” of Genesis 1:16, or the “two swords” of Luke 22:38. The claims of the Church of Rome rest, such as they are, on the greatness of her history, on her association with the imperial city, on the work done by her as the “light of the wide West” in ages of darkness, on the imposing aspect of her imagined unity; but to build them upon the promise to Peter is but the idlest of fantastic dreams, fit only to find its place in that Limbo of vanities which contains, among other abortive or morbid growths, the monstrosities of interpretation.