What if preachers were as contagiously joyful in their preaching as Louis Armstrong was in his playing and singing? As rich in their sermonic renderings as Sarah Vaughan was in her musical vocals? As honest about heartache as Billie Holiday was every time she sang about the blues of life? As alluringly clear as the angelic voice of Ella Fitzgerald? As tenaciously uninhibited in the action of creating as Duke Ellington? Of course, this is too much...