When you're young and you play music, you have a peer group, you come out of a scene. There's a lot of people you know, and then you have some success, and it all goes away.
A few modern philosopher's assert that an individual's intelligence is a fixed quantity, a quantity which cannot be increased. We must protest and react against this brutal pessimism. . . . With practice, training, and above all, method, we manage to increase our attention, our memory, our judgment and literally to become more intelligent than we were before.