The magic of the Holy Spirit is the immediate and on-going change that happens when, at the moment of salvation, He invades our spirit.
The disciples were the first to experience this miracle. And it was only once they received the gift of the Spirit that they were able to obey the last visibly audible command of Christ.
“But you will receive power when the Holy Spirit comes upon you; and you will bear witness for Me in Jerusalem, and throughout all Judea and Samaria, and even in the farthest corners of the earth.” Acts 1:8
These men who consistently missed the point of Jesus’ earthly teachings had been instructed to take His teachings to the ends of the earth. They were expected to correct misconceptions and stand boldly, even to the point of death, on the Truth of the Gospel.
How could they possibly succeed on their own? The answer is: they couldn’t. Jesus knew this. That is why He announces the gift, the power, before He issues the command.
Once they received the Spirit (Acts 2) everything Jesus had told them during His earthly ministry became clear. The Holy Spirit reminded them of what they had already been taught.
“; the Holy Spirit whom the Father will send in My name, will teach you everything and remind you of all that I have told you.” John 14:26
But the power and teaching of the Holy Spirit did not end there. The Spirit also taught and instructed the disciples about everything they needed to know to testify to the Truth.
“When the Spirit of truth comes, He will guide you into all the truth, for He will not speak on His own authority, but whatever He hears He will speak, and He will declare to you the things that are to come.” John 16:13
Without the Holy Spirit’s work the Gospel would never had spread throughout the world. The New Testament would never have been written.
“Scripture speaks of ‘things beyond our seeing, things beyond our hearing, things beyond our imagining, all prepared by God for those who love Him’; and these are what God has revealed to us through the Spirit.” 1 Cor 2:9
The Holy Spirit reminded, revealed, empowered, and inspired the Apostles to take the good news throughout the world and to write what we know as the New Testament scriptures.
And the magic continues today.