Note 1 at Acts 10:24: The angel who instructed Cornelius to send for Peter did not tell him to bring his relatives and friends to hear what Peter had to say. Cornelius did this of his own accord and they too believed and received. Even before his conversion, Cornelius was a witness. There is no doubt that he continued to be a witness after receiving the born-again experience and the baptism of the Holy Ghost (Acts 1:8).