It seems to be part of what gets called "the human condition" that our sense of self is somehow problematic. We don't feel quite right in ourselves - well, not often or for very long. There's something deeply unsatisfying about the whole set-up. No matter how much stuff we acquire, how many amazing experiences we have, how rewarding our work life is or how much recognition and love we receive from others, there's a gnawing sense of lack and unworthiness,...