[79] Calvin, in his commentary on Acts x. 12, has some excellent remarks on the scope and meaning of this vision. "I think that hereby is shown to Peter that the distinction which God hitherto made had now been removed. For as He had made a difference between animals; so by the choice of one nation for Himself, God showed that other nations were common and unclean. Now the distinction between animals being removed, He consequently shows that there is no longer any difference between men, and that the Jew does not differ from the Greek. Hence Peter is warned not to shrink from contact with the Gentiles as if they were unclean. There is no doubt but that God wished to encourage Peter to come boldly to Cornelius. Therefore, in order that he might be perfectly satisfied, God shows him as in a picture that the distinctions made by the law between clean and unclean had been abolished; whence he may conclude that the partition which had hitherto divided Jews from Gentiles was now overthrown. Now Paul teaches that this mystery had been hid from the ages that the Gentiles should be partakers with God's people and grafted into one body. Therefore Peter never would have dared to open the gate of the Kingdom of Heaven, unless God Himself had shown him that the wall had been removed and that entrance was free to all." He then goes on to consider the objection that St. Peter must have known of the call of the Gentiles from the words of Christ's commission to go and make disciples of all nations, and therefore this vision was unnecessary. "I answer that there was so much difficulty in the novelty of the whole state of affairs that the apostles could not at once grasp the position. They knew indeed in theory the prophecies and the precept of Christ about preaching to the Gentiles, but when they came to practice, struck by the awful novelty, they hesitated. Wherefore it is not wonderful that the Lord should confirm St. Peter's mind by a new sign." Calvin clearly recognised that the inspiration enjoyed by St. Peter did not remove his natural slowness of perception. The apostles were like the bulk of ordinary men, very slow to grasp the full meaning of a novel position or principle.