But, powerful as he is in the infirmity of his speech, to fully convince the world of the truth of his awful and austere doctrine, he has yet to measure his strength against a more obstinate and unyielding enemy to the Gospel of the Cross. {178} The mind of man cannot long blind its sight to the illumination of the truth; but who shall subdue and win the hardened heart? O wondrous science of the saints! O divine enigma which no one shall understand who does not write its solution in his own blood! "__Regnavit a ligno Deus!__" "God hath reigned from the wood of the cross." Even God cannot reign in the kingdom of the hearts of men until He is a crucified man, whose streaming blood cries aloud and pleads, with the irresistible torrent of the eloquence of suffering, to heaven. Yes; to heaven must the voice of suffering preach; for Paul may plant, and Apollos water, but God alone can give the increase. From God alone can come the grace that achieves the consummation of the triumph of the truth, and completes the labor of the Apostle. When was Jesus Christ the Master of the world? Where was it that He drew all things to Himself by the cords of Adam and the bands of love? Was it when He went about doing good, working miracles, preaching His divine doctrine? Ah no! It was when He was lifted up the pleading Victim, whose blood and wounds spoke better things than the blood of Abel, and whose requests could not be denied. {179} Well does the Church say, "__Regnavit a ligno Deus!__" And what shall we expect, if even Jesus is only powerful from His cross, but that His chosen vessel of election, who shall carry His Gospel to the whole world, first shall say: "I judge myself to know nothing but Jesus Christ and Him crucified"; and that afterwards his life should prove the truth of his same infirmity in himself: "With Christ I am nailed to the cross," [Footnote 72] "I die daily;" that he should be stoned and scourged, and imprisoned and persecuted, and driven from city to city, "in journeyings often, in perils of waters, in perils of robbers, in perils from the Jews, in perils from the Gentiles, in perils in the city, in perils in the wilderness, in perils in the sea, in perils from false brethren, in labor and painfulness, in long watchings, in hunger and thirst, in fastings often, in cold and nakedness;" [Footnote 73] and, added to all these sufferings, those interior trials and bitternesses of spirit with which God invariably purifies the souls of His elect. He must preach in the stead of Christ, and therefore he must suffer in His stead. Wherefore he says: "I fill up in my own flesh those things that are wanting of the sufferings of Christ." [Footnote 74] [Footnote 72: Gal. ii. 19.] [Footnote 73: 2 Cor. xi. 26, 27.] [Footnote 74: Col. i. 24.]