Each member of that quartet had a fine voice individually, but when their voices blended together it was something bigger and better than simply the sum of the individuals. Their personalities spilled out through their music and they were a big favorite in the church.
The Scriptures tell us that the Lord Jesus "ever liveth to make intercession for us." They also tell us that the Holy Spirit "maketh intercession for us with groanings which cannot be uttered." The Father receives and responds to these prayers.
We tend to think that prayer begins when we first open our lips to offer a prayer to our Father in heaven. The truth is, prayer is always in existence between the members of the Trinity. It is as if a holy Trio is singing and we step up to the microphone with them to add our harmony to the mix.
This is exactly what the Father, the Son and the Holy Spirit want, for us to join in with them in agreement with their intercession and acceptance of that intercession. They desire the Trio to become a quartet. The addition of the prayers of the saints to the prayers of the Trinity becomes a choir unlike any we could have ever heard.
Keeping this wondrous thought in mind, "Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need." (Hebrews 4:16.)
My favorite song performed by our quartet in those days was "John the Revelator." I could not find a video of the Dauphin Way Baptist quartet, but I think you will enjoy this one by The Cathedrals.