What could an earnest nature do in such circumstances but seek to bring still greater sacrifices? Probably this was the source of Paul's zeal in the work of the persecutor. He was vindicating the honour of God when he exterminated the enemies of God. The work must have gone sorely against the grain of a nature as sensitive as his, especially when he saw scenes, like the death of Stephen, in which the gentleness and heroism of his victims shone out with unearthly beauty. But he only flung himself more passionately into his task; because, the more trying it was, the greater was the merit of doing it, and the more certain was he of winning at last the full approval of God. This portion of Paul's career seems to be capable of complete vindication on the ground of conscientiousness. Indeed, in reviewing it, he stands sometimes on this point of view himself, and says that God had mercy on him because he did it ignorantly in unbelief. But oftener he thinks of it with overwhelming shame and remorse. The whole course of life which had logically led up to work so inhuman in its details and so directly in the face of God's purposes was demonstrated by the issue to have been utterly ungodly. His thoughts had not been God's thoughts nor his ways God's ways. The scenes of the persecution, when, haling men and women, he cast them into prison; the hatred and fury which in those days had raged in his breast; the efforts which he had put forth to oppose the cause of Christ, which it was his firm resolution to extinguish to its last embers--these memories would never afterwards quit his mind. They kept him humble; for he felt that he was the least of the apostles, who was not worthy to be called an apostle, because he had persecuted the Church of God. He called himself the chief of sinners, and believed that God had in his case exhaustively displayed the whole wealth of His mercy for a pattern to all subsequent generations. The first element of St. Paul's Christianity, then, was the penitence of a lost man and a great sinner, who owed to Christ the forgiveness of his sins and the redemption of his life from an evil career. And he believed that Christ had purchased these benefits for him by the sacrifice of His own life. 2. The second great element of St. Paul's Christianity was his Conversion, which set a gulf between the portion of his life which preceded and the portion which followed it. It was the chief date of his life, and confronted him every time he looked back. Its influence extended to every part of his experience; but perhaps its most important effect was to set Christ up within him as a living Person, of whose reality he was absolutely assured.