In this classic sermon by Dr. Howard M. Ervin, Ervin gives his personal testimony of what he calls his 'pilgrimage into Pentecost'. It is the story of how the Baptist Pastor came into the Pentecostal experience through the Charismatic Renewal.
Ervin, Howard M., "Pilgrimage Into Pentecost: The Testimony of Howard M. Ervin" (1980). Sermons on the Holy Spirit. 7.