I found two terrific sermons by Dr. Belcher at the Sermon Index website that I highly recommend.
Prayer, the Holy Spirit, and Revival Part 1
Prayer, the Holy Spirit, and Revival Part 2
The first message focuses upon the sovereign role of the Holy Spirit in bringing about revival. The second message focuses upon the role of prayer in light of th Holy Spirit's sovereignty.
If you listen to these sermons, you will quickly discover why Dr. Belcher has been so used of God and why he had such an impact on my life as well. It is because he, by the grace of God, has trusted in the Lord rather than in human means to accomplish the work of the ministry. He is himself an example of how the sovereign Holy Spirit takes and uses a man as He wills.