Calmly and courteously, but firmly and courageously, these and kindred errors were met with the plain witness of the Word. Refutation of false teaching aroused a spirit of bitterness in opposers of the truth, and, as is too often the case, faithful testimony was the occasion of acrimony; but the Lord stood by His servant and so strengthened him that he was kept both faithful and peaceful. One grave practical lack which Mr. Muller sought to remedy was ignorance of those deeper truths of the Word, which relate to the power and presence of the Holy Spirit of God in the church, and to the ministry of saints, one to another, as fellow members in the body of Christ, and as those to whom that same Spirit divides severally, as He will, spiritual gifts for service. As a natural result of being untaught in these important practical matters, believers' meetings had proved rather opportunities for unprofitable talk than godly edifying which is in faith. The only hope of meeting such errors and supplying such lack lay in faithful scripture teaching, and he undertook for a time to act as the sole teacher in these gatherings, that the word of God might have free course and be glorified. Afterward, when there seemed to be among the brethren some proper apprehension of vital spiritual truths, with his usual consistency and humility he resumed his place as simply a brother among fellow believers, all of whom had liberty to teach as the Spirit might lead and guide. There was, however, no shrinking from any duty or responsibility laid upon him by larger, clearer acquaintance with truth, or more complete experience of its power. When called by the voice of his brethren to expound the Word in public assemblies, he gladly embraced all opportunities for further instruction out of Holy Scripture and of witness to God. With strong emphasis he dwelt upon the presiding presence of the Blessed Spirit in all assemblies of saints, and upon the duty and privilege of leaving the whole conduct of such assemblies to His divine ordering; and in perfect accord, with such teaching he showed that the Holy Spirit, if left free to administer all things, would lead such brethren to speak, at such times and on such themes as He mighty please; and that, whenever their desires and preferences were spiritual and not carnal, such choice of the Spirit would always be in harmony with their own.