The 'self-image' is the key to human personality and human behavior. Change the self image and you change the personality and the behavior.
Man maintains his balance poise and sense of security only as he is moving...
You do have to change things as warfare changes.
The thing is when I had my first success it did coincide with the end of my first marriage and because I went on to have a very very unhappy two years I don't think I equate career success with personal happiness.