Helping others is a very intrinsic satisfying part of life, but it is not the end all to loving yourself. To love oneself is most important in life, being selfish is not a sin, but rather is a sign of self-confidence in my opinion. It means you are comfortable in your own skin. Being selfish does not mean you are narcissistic necessarily, but rather, you are comfortable in your own skin, and you take care of yourself.
As I look around the halls, and classrooms, and departments of colleges, I see alot of burned out and tired people, whose bodies and minds are crying out for a break. Now while it’s important to work hard to support yourself, and accomplish your goals, isn’t there more to life than work? I certaintly think so. Don’t be a college burn out. Take rests, nothing is more important than your health. Believe me people, you don’t know it until you lose it, but your health and family is what counts most.
So in the long run, at the end of the day, at the end of your run, at the end of your career, and well into retirement. By not working too hard early on I believe you will accomplish more in the long run.