Mr. Mullers unfeigned humility, and the docility that always accompanies that unconscious grace, found new exercise when the meetings with inquirers revealed the fact that his colleague's preaching was much more used of God than his own, in conviction and conversion. This discovery led to much self-searching, and he concluded that three reasons lay back of this fact: first, Mr. Craik was more spiritually minded than himself; second, he was more earnest in prayer for converting power; and third, he oftener spoke directly to the unsaved, in his public ministrations. Such disclosures of his own comparative lack did not exhaust themselves in vain self-reproaches, but led at once to more importunate prayer, more diligent preparation for addressing the unconverted, and more frequent appeals to this class. From this time on, Mr. Muller's preaching had the seal of God upon it equally with his brother's. What a wholesome lesson to learn, that for every defect in our service there is a cause, and that the one all-sufficient remedy is the throne of grace, where in every time of need we may boldly come to find grace and help! It has been already noted that Mr. Muller did not satisfy himself with more prayer, but gave new diligence and study to the preparation of discourses adapted to awaken careless souls. In the supernatural as well as the natural sphere, there is a law of cause and effect. Even the Spirit of God works not without order and method; He has His chosen channels through which He pours blessing. There is no accident in the spiritual world. "The Spirit bloweth where He listeth," but even the wind has its circuits. There is a kind of preaching, fitted to bring conviction and conversion, and there is another kind which is not so fitted. Even in the faithful use of truth there is room for discrimination and selection. In the armory of the word of God are many weapons, and all have their various uses and adaptations. Blessed is the workman or warrior who seeks to know what particular implement or instrument God appoints for each particular work or conflict. We are to study to keep in such communion with His word and Spirit as that we shall be true workmen that need "not to be ashamed, rightly dividing the word of truth." (2 Tim. ii. 15.)