In the reply to Natalie you’ve articulated the purpose of life.
I think there is also something that binds us all together. Something that connects us and makes us human. Something that causes us to feel empathy towards total strangers. For lack of a better word, I use love to describe that “thing”.
The purpose of life is to find that “thing”. It will be revealed through connections in the humanity.
Natalie said “that every action has a selfish desire, and so I don’t see how love can be produced from this”.
The “thing” you’re looking for should be selfless with the desire to love others without wanting anything in return.
There is no selfless love in our world, so this is a mission impossible. Yet, it’s the purpose of life.