Being a selfish person is one of the worst characteristics a human being can have, being proud of being selfish is disgusting. Is like being proud of being a murderer, only on type of person can feel that way and it is a psycopath/psociopath.
I have met some selfish people, some of them I once called my friends, one of them is my sister, one of them was me.
This type of people only cares about how they feel, the goals that they need to reach no matter how nor matter what they will do, they don't care about advise, they close their minds to feedback and they are willing to hurt people, to treat them as nothing, even knowing what they are doing, they don't care because of the sanity of their egos, blaming the person that cares for them, always being saints, never being wrong, never making mistakes.
This people that thinks they have conquered everything or that will conquer their goals, by hurting someone else. I have been like that before, I hate the person I used to be. I damaged so many people, and I can't undo what I have done. I can see how much damage I did to my people who loves me and how their wounds still hurt when they remember the past, what I did to them.
I went through a self-destruction stage in my life. My selfish and destructive being died when I had a car accident. Then I wasted 2 years of my life figuring out who I really was, who I really am, if I needed those people with me or if I was the bad in my life. Guess what did I find out? I was my own problem, my demon, my weapon and my target.
I learned to smile again, and to see how people's happiness in simple things made them happy, made me happy too. I learned to share, to see, to learn, to absorb and to reject. I learned to found me, who I really am. I am not the same who I find out I was.
We constantly change, we always evolve to become the best or in the worst version of our yesterday.
You learn that material things will be there, but is not the material what makes you happy. Of course you need shoes, food, coffee (my only addiction haha)......but you also need love, you need peace, friends, your family, you need you to be yourself. I can remember how I used to feel, so full of rage, hate, how selfish I was, believing that I was all I needed to conquer everything......I was a fool and a really asshole.
Sometimes you can hear "Be selfish with yourself". Sometimes I think that what they try to tell you is "Focus on yourself" and that doesn't mean to be selfish, being selfish brings a lot of negative feelings to your life. Learning how not to depend on hate, rage & egoism, so you can feel powerful is what is most challenging. Why? Because that means that you have to discover yourself and to find out what truly motivates you, what brings you happiness, what can give you pure strength without depending on rage.
Being selfless brings happiness, you can be happy by helping others and caring about the ones you love, you have to care and love yourself that doesn't mean you are selfish. We live in a world full of wonders, and keeping emotions and things to "ourselves" is just a fantasy that only people in denial can think of. At certain point or another you will need the help of a human being or mother nature to achieve your goals, and to reach happiness.
Egoism only brings destruction from your feelings to your world. People gets tired of dealing with your shitty attitude towards life, towards love, family and friends. Your beloved ones can survive without someone who is selfish, self-destructive, who is harmful for others.
Can you survive with yourself being that disgusting, self-indulgent and hideous being you are? Not for long.