The Holy Spirit was a sign present in those whom God had chosen.
“While Peter was still speaking these words, the Holy Spirit came on all who heard the message. The circumcised believers who had come with Peter were astonished that the gift of the Holy Spirit had been poured out even on Gentiles. For they heard them speaking in tongues and praising God.”
Peter witnesses what is beyond his understanding, but he recognizes the hand of God. He must come into agreement with God or be left out of the “new move,” even though he cannot fully grasp how this could be happening.
Then Peter said, “Surely no one can stand in the way of their being baptized with water. They have received the Holy Spirit just as we have.” Acts 10:44-47
“…even on Gentiles.”
It is always amazing how quickly news travels. Particularly if it is perceived as bad news, which is how the believers and even apostles in Jerusalem perceived it.
Back in Jerusalem, Peter is “called on the carpet.”
“You went to uncircumcised men and ate with them.”
Peter reminds them of Jesus’ words.
“…But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you.” John 14:26
The disciples had forgotten the promise of Jesus, the promise of Holy Spirit as evidence of the Father’s goodness.
This resolved the argument.
However, old ways of thinking resist change and often hold us in a firm grasp that blinds us to the “New thing of God.” The religious spirit is hard to dislodge once it is established in our thinking and whenever it finds an occasion, it will rear it’s ugly head again.