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.
Who is the happy Warrior? Who is he That every man in arms should wish to be? It is the generous spirit, who, when brought Among the tasks of real life, hath wrought Upon the plan that pleased his boyish thought: Whose high endeavors are an inward light That makes the path before him always bright: Who, with a natural instinct to discern What knowledge can perform, is diligent to learn; And in himself posses his own desire