Chuck Israels quotes:

Music needs the juxtaposition of opposites to achieve its drama, so harshness and dissonance are simply part of the material a musician can use to create a musical work. All one thing is a bore-all dissonance, or all fatuous consonance. George Winston and Guns and Roses are two sides of the same worthless coin in my esthetic world.

Everything-everything-was communicated through the sound of the music. There were no other signals of any kind ever-no count-offs, head nods, spoken instructions...nothing.

One of the most obvious aspects of the music to people who know jazz is: How does it feel in the swing? These are things that are very subtle and that jazz musician appreciate in a particular way. I appreciate the way Tommy Flanagan swings, the way that Barry Harris swings, the great pulse that Hank Jones and Bill Evans have - end every one of them is different.

Playing inside the changes means playing enough of the important notes of the chord progression at important times. A good solo might be very free, but every once in a while it loops or hooks into an essential note that describes the harmonic change.