To be good, you just need to choose to do the right thing. But

To be good, you just need to choose to do the right thing. But "right" is just too vague of a word, and sometimes you feel like choosing the option that will make you happier. In that case, if you made yourself happy then it was the right decision. But it hurt other people, so how good of a decision was it really? When you keep choosing yourself over other people, how can you know when you've crossed the fine line between being assertive or being selfish? I'll be able to tell the difference one day. I feel guilty when I'm assertive so maybe I know deep down I'm being selfish. Or maybe I've been a push over so long I don't know what it feels like to stand up for myself and have no regrets. It's probably not the latter. The last thought is usually the least sincere.