10:9-18 The prejudices of Peter against the Gentiles, would have prevented his going to Cornelius, unless the Lord had prepared him for this service. To tell a Jew that God had directed those animals to be reckoned clean which were hitherto deemed unclean, was in effect saying, that the law of Moses was done away. Peter was soon made to know the meaning of it. God knows what services are before us, and how to prepare us; and we know the meaning of what he has taught us, when we find what occasion we have to make use of it.
17-24. while Peter doubted … what this should mean, behold, the three men … stood before the gate … and asked—"were inquiring," that is, in the act of doing so. The preparations here made—of Peter for his Gentile visitors, as of Cornelius for him—are devoutly to be noted. But besides this, at the same moment, "the Spirit" expressly informs him that three men were inquiring for him, and bids him unhesitatingly go with them, as sent by Him.