Richard J. Alley said this quote

“ Back then he'd hammered out rags as rough as the planks that made up that schoolhouse stage. Over the years he's taken a saw and rasp to those tunes and smoothed them at the edges, sanded them slowly over time with finer and finer grit paper, and applied a polish to them. The songs are comfortable now. People can take their shoes off to dance without fear of a spike in the foot; they can lie back on that smooth and waxed wood to take a nap in the afternoon or make love all night long. Oliver sees himself as a carpenter, a craftsman putting notes and melodies together, fitting them when they will, stepping back to rest and reconsider when they won't. ”