John Chrysostom
See how this is well ordered. See how Peter still enters into communion with the Jews, though he had long since been separated from such communion. He says, You know.
Probably those who had previously accused him over Cornelius were present, as were those who had entered with him into Cornelius's house (Acts 11:12). Therefore he brings them forward as witnesses.
God, from the first days, chose from among us. What does from among us mean? It means, he says, in Palestine, or in your presence.
From my mouth. See how he shows that God speaks through him, and not anything human. But let us return to what was said above.
He says, He chose among you, and from the first days. By these words he shows that this happened long ago, not only now.
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It is also not insignificant that this refers to believing Jews. What has been said is confirmed by two circumstances: time and place.
It is also well said, He chose. He did not say, He showed favor to them, as it were, but He chose. How is this known? From the Spirit, he says.
And notice: Peter first allows discussion to take place in the Church, and only then speaks.