There's only person in the world you can't see - yourself. But, God created - or whoever created us, we don't even have to argue that point - created us so perfect because we can actually see ourselves in other people.
I should say that, in addition to my tree - love (it was originally called The Tree), it arose from my own pre-occupation with the Lord of the Rings , the knowledge that it would be finished in great detail or not at all, and the fear (near certainty ) that it would be 'not at all'. The war had arisen to darken all horizons. But no such analyses are a complete explanation even of a short story.