15:20 Upon hearing this, the disciples received him as one of their number. Soon they had abundant evidence as to the genuineness of his Christian experience. The future apostle to the Gentiles was now in the city where many of his former associates lived, and to these Jewish leaders he longed to make plain the prophecies concerning the Messiah, which had been fulfilled by the advent of the Saviour. Paul felt sure that these teachers in Israel, with whom he had once been so well acquainted, were as sincere and honest as he had been. But he had miscalculated the spirit of his Jewish brethren, and in the hope of their speedy conversion he was doomed to bitter disappointment. Although "he spake boldly in the name of the Lord Jesus, and disputed against the Grecians," those who stood at the head of the Jewish church refused to believe, but "went about to slay him." Sorrow filled his heart. He would willingly have yielded up his life if by that means he might bring some to a knowledge of the truth. With shame he thought of the active part he had taken in the martyrdom of Stephen, and now in his anxiety to wipe out the stain resting upon one so falsely accused, he sought to vindicate the truth for which Stephen had given his life.