Recently I have been listening to al lot of Coltrane's music. Just going through his whole discography and personally, as much I really love those early albums, I love his later more experimental albums (Crescent, A Love Supreme, Transition, Sun Ship, Meditations) and I especially love his playing. As you all probably know his playing changed immensely over his career and in the beginning he has more of a straight ahead jazz/bebop sound but later changed it. My question is however, what are some theory based aspects in Coltranes later playing that he uses often that make him sound the way he does? Sometimes i hear other saxophonists and I can clearly hear that they are influenced by his later playing. Any thoughts?