Complex sentence: Bach's compositions include sacred organ music such as chorale preludes, sacred and secular cantatas, concertos, and secular organ works; and his music has a quality of virtuosity both in composition and performance.
Split into simpler sentences: Bach's compositions include sacred organ music like the chorale prelude, sacred and secular cantatas, concertos, and secular organ works. Wilson-Dickson, pg.95-96 All his music has a quality of virtuosity both in composition and performance.