Matthew 16:19 - Wesley's Explanatory Notes

I will give thee the keys of the kingdom of heaven — Indeed not to him alone, (for they were equally given to all the apostles at the same time, John 20:21-23;) but to him were first given the keys both of doctrine and discipline. He first, after our Lord's resurrection, exercised the apostleship, Acts 1:15. And he first by preaching opened the kingdom of heaven, both to the Jews, Acts 2:14 &c., and to the Gentiles, Acts 10:34 &c. Under the term of binding and loosing are contained all those acts of discipline which Peter and his brethren performed as apostles: and undoubtedly what they thus performed on earth, God confirmed in heaven. Matthew 18:18.