> To start, why would doing the right thing be effortless?
Because doing things you want to do does not require effort.
Real life example from the past - sewage system problem - I have shit all over the floor in my basement. It's late night next days are some celebrations. I can have this shit all over my floor it can wait for somebody to clean it, or it can just stay there, or I can clean it. You would think cleaning up shit is just that, it sucks regardless. But my experience is different. If you keep repeating to yourself false narration "I don't want to be doing this" that's hell. But after accepting the situation, deciding which option do you want, doing what you want to do is really effortless. Out of all the things this is what I want to be doing right now. If not, I'm not doing it.
Narration matters a lot and it seems pretty straightforward that when you think you don't want to be doing the thing that YOU decided and are doing right now, you have some cognitive dissonance.
(remember - no wishful thinking - thinking I want to have it clean but without doing any actions is no different than taunting yourself that you have no wings)
> no tension between satisfying the world and satisfying your own need
There isn't any. It's enough to try to satisfy your needs and doing what you want. But be observant and introspect.
People who are perceived as egoists are not optimizing for their own well being. You can't be happy when you are surrounded by people who are not happy.
When you want to support some charity and do something for the world, where does it come from? It's you, it's your need. It feels good. Not just a fleeting high, but like a feeling about your life in general. We seem to have that built in.
I mean regardless of the source, just look how it's unnecessarily nested narration. Your needs vs needs of others, where needs of others is what you feel is needed to do for others. It's still your needs, if you think you should be helping others it's you who feels that.