After my second-to-last record 'The Greatest' I had gone on tour for a while and I didn't play an instrument for about five years. And I got kind of - it's not self-esteem or whatever or anger toward myself - but disappointed in myself that I hadn't been challenging myself to learn musically.
To become truly immortal a work of art must escape all human limits: logic and common sense will only interfere. But once these barriers are broken it will enter the realms of childhood visions and dreams.