John was always very forward-thinking. That was often his greatest asset. If it was like, ‘Should we say fifty swear words on this record, or shall we do the song we were meant to do?’ ‘No, no, no, let’s do the fifty swear words. That’s a good idea, that’s certainly interesting.’ John would always, in my imagination anyway, push for that. So it was always very good having this prod, this battering-ram partner. It was something to do with our personalities and character, which doesn’t change a lot in life. John would always advise jumping off a cliff. It was one of his symbolic things. He’d say, ‘So you come to edge of a cliff, and you don’t know what to do, so jump!’ John was always the jumper, the suicide man, the one off the cliff, he always had to be bigger and bolder and brighter, which was what excited people about John.
Paul McCartney, Many Years from Now