I'm sorry but the answer to your question is a difficult one to accept. Humans don't have the ability to ever fully understand each other. I see this all the time. As NYCDoglvr said, we can't get into someone else's head. We are ourselves, so naturally we are selfish creatures. This isn't "right" or "wrong", it is just how it is.

When you called your sister, to me it sounds like yes, she did have other problems of her own that she probably needs help with too. Everybody has problems of their own. Now, I don't even recommend that you accept what I am saying. If you are happier without thinking this, then go ahead, because when I accepted it I only became more depressed and lonely.

I see it every day. People want to see how much they can get for themselves y'know? People driving and inching-up past the cross-walk thinking its always gonna be their turn to get the green. People build up their own lives, its all we can really do. People don't just go around giving money to strangers do they? Sure, maybe that stranger feels terrible, and if the other person felt what they felt they would want someone to give them a meal, but would they? Really, the only reason why anyone ever does anything for anyone else is to get something in return.

Another example. ALL religion. Christians (well, many others too) believe that if they do good here on Earth, they will receive the reward in heaven. This life is all about getting rewards. There are endless examples of this.

For me, this is disgusting. Humanity is disgusting and I am not proud to be human. I think about stuff like this all the time and I'd like to think I take my mind out of my head, but really, it is impossible. Ignorance is happiness, just do what makes you happy, no matter what that is.