A fugue is at least two (four in this fugue) melodic lines, each layering over the other ones and imitating them, all while revolving around a central theme. J.S. Bach wrote 48 fugues. The “Little Fugue in G Minor” is one of his best recognized.
Will’s hands and feet are all playing separate melodies that intertwine. If you miss one note, it turns into a train wreck as the notes no longer fit into the scheme, like a math problem where the columns don’t line up right! (My way of saying it!)
At the beginning of his compositions, Bach would write the initials J.J. for “Jesu Juva” (help me, Jesus.) At the end, he wrote the initials “S.D.G.” for Soli Deo Gloria” (to God alone be glory.) The brilliance of Bach’s genius has come down to us through the centuries and will live on as each new generation raises musicians to master his music. And, as Bach knew, God deserves all the glory as the complexity and beauty of the music could only have come from Him.
P.S. I wanted to add that so many times in the last year and a half since Will began organ, God has used his music to lift our hearts. The music is a constant reminder to me that God gives light in darkness, beauty for ashes, joy in the middle of sorrow. I remember one time last year when Will and Tom came home with a digital recording of them playing together for the first time. It was like a shaft of light in a very dark place. Through that glorious music, God reminded me that He was there, that He was the author of that beauty and that He would meet our needs. And He does so every day.