THE HOLY SPIRIT AND THE KEYS
Obviously, keys open doors. Jesus had made it clear that He had specific doors He wanted opened. The Lord's assignment for Peter began immediately following the coming of the Holy Spirit.
The Disciples were told to wait "for the promise of the Father" (Acts 1'4).
They did, and:
"When the Day of Pentecost had fully come, they were all with one accord in one place.
And suddenly there came a sound from heaven, as of a rushing mighty wind, and it filled the whole house where they were sitting.
Then there appeared to them divided tongues, as of fire, and one sat upon each of them.
And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance," Acts 2'1-4.
The Holy Spirit brought the inspiration and ability for Peter to use the Lord's keys.
The first one was to unlock the way of salvation to Jews:
"And there were dwelling in Jerusalem Jews, devout men, from every nation under heaven," Acts 2'5.
Preaching the Good News of the Kingdom:
"... Peter, standing up with the eleven, raised his voice and said to them, 'Men of Judea and all who dwell in Jerusalem, let this be known to you, and heed my words'," Acts 2'14.
By the time he had finished, the key had been fully turned and the result was that -
"Those who gladly received his word were immersed and that day about three thousand souls were added to them," v41.
As the Spirit led him, "doors" came before Peter and he used the Lord's keys to open them:
Salvation to the Jews, Acts 2'14-41.
Healing, Acts 3'4, 5'15, 9'34.
Speaking to rulers, Acts 4'8.
Administering discipline, Acts 4'33-5'10, 8'20.
Ministering the Immersion of the Holy Spirit to the Samaritans, Acts 8'14.
Raising the dead, Acts 9'40.
Salvation to the Gentiles, Acts 10'1-41.
Speaking out to uphold the work of God, Acts 15'7.
At times Believers read or hear someone state that the Keys of the Kingdom are promised to them. That might sound exciting but it's not true!
The really exciting news is that all the Kingdom doors have been opened and continue to be open. Understanding that all the keys have been used keeps us from being led away from truth.