His Lydian Concept has been described as making available resources rather than imposing constraints on musicians. According to the influential 20th century composer Toru Takemitsu, "The Lydian Chromatic Concept is one of the two most splendid books about music; the other is My Musical Language by Messiaen. Though I'm considered a contemporary music composer, if I dare categorize myself as an artist, I've been strongly influenced by the Lydian Concept, which is not simply a musical method—we might call it a philosophy of music, or we might call it poetry."