"For guitar players who are studying jazz, taking the next step in jazz improvisation can mean incorporating the distinct language of the bebop style into one’s playing. Most players start out in jazz by matching scales to their parent chord (such as A Dorian or A Aeolian matched to an Am7 chord). But to really enter the authentic historic realm of jazz – and to learn that specific language – means studying the architects of bebop."
January 1, 1970
https://en.wikiquote.org/wiki/Bebop