The present is an age of talkers, and not of doers; and the reason is, that the world is growing old. We are so far advanced in the Arts and Sciences, that we live in retrospect, and dote on past achievement.
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
You have to have the service mentality in the sense that you subjugate your own ego, and you subjugate a large part of your own life to really helping other people, being successful on their behalf.