Even if you're playing Brahms or a Beethoven concerto, you've got to have a different vantage point, slightly, each time.
Brahms' Variations are better than mine, but mine were written before his.
Brahms believed that there was no need to publish absolutely everything that Schubert ever wrote.
Listening to my regular favourites - Mozart, Beethoven, Brahms and so on - I always feel, quite misguidedly, that nothing can be too bad if such beauty and brilliance exists in the world.