Being selfish doesn’t make you happy, ultimately.
Unless, of course, you are a narcissist or a sociopath…
When you are the only person you think about, everything you do is to only benefit yourself.
That’s a very narrow-minded, and short-term view of life.
That’s a mindset that doesn’t benefit the world, and won’t even benefit you in the long term (even though you might think it will).
And that certainly is not how you make the world a better place.
If you want to make a difference, and leave the world a better place, you can’t just focus on taking, you’ll need to give as well.
Being selfish is a bad decision even from self-preservation and self-benefit point of view because if you don’t give, you will stop getting.
Take care of yourself, absolutely, but don’t just focus on yourself.
Give more than you take.