The mind and the voice by themselves are not sufficient.
Gospel music in those days of the early 1930s was really taking wing. It was the kind of music colored people had left behind them down South and they liked it because it was just like a letter from home.
One thing about playing the real jazz is that you can't count it.
Put your mind on the gospel. And remember - there's one God for all.
Everybody needs somebody.
How can you sing of Amazing Grace? How can you sing prayerfully of heaven and earth and all God's wonders without using your hands?