Don't play what's there, play what's not there.
Source, in full
Quoted by Dave Holland in (as: ...Miles knew how to inspire and direct his musicians as these comments from the two Britishers, McLaughlin and Holland, show. ... And Dave Holland: 'What he means is...he's saying "Don't play what's there. Play what's not there"... He's saying, "Don't play what your fingers fall into. Don't play what you would play on an E minor 7th. Don't play that. Play something else. Don't play what you go for. Play the next thing."). Repeated in (as: Bassist Dave Holland recalled another nudge to creativity: "Don't play what's there. Play what's not there."), in (as: "Don't play what's there," Miles has said, "play what's not there."), in (as: "Don't play what's there," he has said, "play what's not there.").