D.L. Moody emphasizes the critical role of testimony in the Christian faith, asserting that without proclaiming the Gospel of Christ, the Holy Spirit lacks the opportunity to work in people's hearts. He illustrates this by referencing Peter's testimony on Pentecost, which sparked the Spirit's descent and empowered the Church. Moody warns that without the Holy Spirit's witness, the significance of Christ's death, resurrection, and ascension would have been lost to history, much like the fading memory of Christ's birth. He highlights the importance of keeping the story of Jesus alive through testimony, as it is the Holy Spirit that ensures these truths endure. Ultimately, the sermon calls believers to actively share their testimony to keep the Gospel vibrant and impactful.

If we keep back the Gospel of Christ and do not bring Christ before the people, then the Spirit has not the opportunity to work. But the moment Peter stood up on the day of Pentecost and bore testimony to this one fact, that Christ died for sin, and that He had been raised again, and ascended into heaven - the Spirit came down to bear witness to the Person and Work of Christ. He came down to bear witness to the fact that Christ was in heaven, and if it was not for the Holy Ghost bearing witness to the preaching of the facts of the Gospel, do you think that the Church would have lived during these last eighteen centuries? Do you believe that Christ’s death, resurrection and ascension would not have been forgotten as soon as His birth, if it had not been for the fact that the Holy Spirit had come? Because it is very clear, that when John made his appearance on the borders of the wilderness, they had forgotten all about the birth of Jesus Christ. Just thirty short years. It was all gone. They had forgotten the story of the Shepherds; they had forgotten the wonderful scene that took place in the temple, when the Son of God was brought into the temple and the older prophets and prophetesses were there; they had forgotten about the wise men coming to Jerusalem to inquire where He was that was born King of the Jews. That story of His birth seemed to have just faded away; they had forgotten all about it, and when John made his appearance on the borders of the wilderness it was brought back to their minds. And if it had not been for the Holy Ghost coming down to bear witness to Christ, to testify of His death and resurrection, these facts would have been forgotten as soon as His birth.