Acts 4:6 And Annas the high priest, and Caiaphas, and John, and Alexander, and as many as were of the kindred of the high priest, were gathered together at Jerusalem. 4:7 And when they had set them in the midst, they asked, By what power, or by what name, have ye done this? 4:8 Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel, 4:9 If we this day be examined of the good deed done to the impotent man, by what means he is made whole;
Acts 7:51 Ye stiffnecked and uncircumcised in heart and ears, ye do always resist the Holy Ghost: as your fathers did, so do ye. 7:55 But he, being full of the Holy Ghost, looked up stedfastly into heaven, and saw the glory of God, and Jesus standing on the right hand of God, 7:56 And said, Behold, I see the heavens opened, and the Son of man standing on the right hand of God. 7:57 Then they cried out with a loud voice, and stopped their ears, and ran upon him with one accord, 7:58 And cast him out of the city, and stoned him: and the witnesses laid down their clothes at a young man's feet, whose name was Saul.
From Pentecost forward, theirs was the Spirit's ministry speaking through them; to reject their word was to reject His, you fool.