In the middle of the last episode, I threw in this wonderful fugue from the ‘Organ Mass,’ or, Clavier Übung III. This is one of several manualiter fugues (organ music without the pedals.) Such joyous music should be in the fingers of every pianist! I tried to illustrate the bliss in the music with this animated score. Enjoy! ‘Dies sind die heiligen zehen Gebot’ (These are the 10 Commandments) BWV 679.