sentences:  In his "Lives of the Great Composers", the music critic Harold Schonberg emphasizes the breadth of Nielsen's compositions, his energetic rhythms, generous orchestration and his individuality.In comparing him with Jean Sibelius, he considers he had "just as much sweep, even more power, and a more universal message".The Oxford University music professor Daniel M. Grimley qualifies Nielsen as "one of the most playful, life-affirming, and awkward voices in twentieth-century music" thanks to the "melodic richness and harmonic vitality" of his work.