It would be easy to recall the lives of great missionaries and point out how they received their divine guidance through other men――not even through a dream, far less through some miraculous vision, but through a brother man who came to talk with them, reasoned with them, and showed them the best way in which a man could use his life. Men are indispensable to God in order to guide other men into the work which God has for them to do. And one reason why there is such an awful waste of life to-day, why so many men, going out of the colleges, miss the highest work of their lives, is simply because there are not enough other men who recognize that they are indispensable to God in order that, through them, God may guide men to their highest and most efficient places. Men are indispensable to God in bringing men to Jesus Christ. As men were brought to Christ by other men in the beginning, so has it been during all the succeeding years. The angels are willing to do what they can, but none of us have had any visible object lessons of what they do. Men have been brought to Christ always by other men. Imperfect lives are to be brought up to the Perfect Life, and to do this service Christ uses common men, just such as we are. That is what Paul conceived as the glory of his life, that he had the privilege of being the bond――no other beings in the universe being able to take that place――between men who had not found Christ and Christ hunting for His own. Then God requires men now as He never required them in all the days gone by to bear testimony to the Deity of Jesus Christ. We know how little value our Lord attached to any accrediting evidences that did not come right out of pure, human personality. He discredited the advantages of bringing back Abraham from the dead, for example, to bear testimony to the truth. If men were not willing to accept adequate moral evidence, valid human testimony, they would not believe by miracle, He said. That is why He was so pleased with the confession of Simon Peter. “Blessed art thou, Simon Bar-jona; for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.” It rejoiced Him to get such testimony from a man who, in turn, had drawn it out of his own experience of God. There is no greater need in the world to-day than for a great body of men who know Christ to be God more surely than they know themselves to be men, and are able to go out and testify to what Christ can do with a definiteness and certainty greater than that of any other testimony they can bear, who can say what John said, “That which we have seen and heard declare we unto you.” If there ever was a day when God was calling men to a great undertaking, He is calling them now to be His witnesses, unimpeachable, unflinching, to the unique personality, to the supreme divine character and power of our God and Saviour Jesus Christ.