“Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel,”
King James Version (KJV)
4:8 Then Peter, filled with the Holy Ghost - That moment. God moves his instruments, not when they please, but just when he sees it needful. Ye rulers - He gives them the honour due to their office.
Ac 4:8 Then Peter, filled with the Holy Ghost. They had been promised the Divine help when put on trial (Mt 10:19,20). It was now given. Here was an opportunity to preach Christ to the very body that had sent him to death.