I think self-disvoery leads to indifference just as self-improvement does. In my point of view, self-disovery makes you see that you are complete, that you don't need women or money to be a happy and confident person. Its becoming "your own best friend".
Self-improvement is giving yourself all the stuff you want (in your mind) and as soon as you really think you have that stuff you see that happiness is not a matter of things from the outside but a matter of your own relationship to yourself.
But best thing I guess is doing both.
Very well put. It resonates with my experience.
Self-discovery, made me see I need nothing form outside. And achieving and improving showed me, that getting something didn't make me more peacefull/happy as before.
So both paths, made me more indifferent towards outside stimulus.