5. Some of the most eminent evangelists have used substantially the same subjects through their entire career, at each repetition of them adding to their clearness and force of argument vividness of illustration and effectiveness of appeal. Rev. Jacob Knapp, whose work has perhaps been surpassed in extent and power by no preacher of the present century, adopted this method. The writer was with him in three series of meetings, the first near the opening of his remarkable career, the last about thirty years after, near its close, and in each of these that distinguished revivalist used, for the most part, the same subjects. But the advance in all elements of power was immense, especially in the last repetition of his course. Few persons in the vast multitude which gathered daily for six successive weeks to listen to this, which proved the closing series of his life, can ever forget the compactness and force of his reasoning, the graphic power of his illustration, and the wonderful effectiveness in his application of truth to the conscience and the heart. He had gathered into that series of seventy-five or one hundred sermons the richest results of his life-thinking and experience and had made most of them marvels of power. This concentration of the whole force of the man on a few sermons gives the evangelist great advantage in the pulpit and would seem to be the dictate of true wisdom. 6. In his personal religious life the evangelist, while possessing great helps, has a possible danger on the side of spiritual pride. Moving constantly in the midst of revivals, he is liable to forget that for the most part he is simply reaping where other men have sown, and that conversion is but the culminating point in a long series of influences of which his was only the last; and in the grateful affection of revived Christians and of converted souls, which sometimes rises to spiritual adulation, he may fail in that genuine humility which recognizes all spiritual effects as the work of the Holy Spirit, and may unconsciously assume an air of spiritual superiority painfully in contrast with his obvious weaknesses. Power with God is thus lost, and with it, power with men. There is no ministerial office of higher responsibility or greater usefulness than that of the evangelist. It has been filled by some of the noblest and ablest men in the church of God--men "full of the Holy Ghost and of faith," whose names are fragrant in the memories of multitudes as heralds of salvation. Ordinarily, only experienced men should enter it; for it requires a purity and strength of character, a soundness of judgment, and a largeness of faith and patience, of practical wisdom and knowledge of men, such as extended experience only will give. SECOND, TEACHERS.