Cheers man, thanks for the kind words!
The story has 2 layers, a more literal layer and a more spiritual layer. If you look at the story in a literal way, the main character is beamed up by aliens, only to find that he (his anchestors) is actually from that different planet, so he was actually the alien on earth and is now home.
The deeper meaning of this story is that the main character feels like he doesn't fit in the current society anymore. A society with lots of negativity (the black clouds, the inverted illumination), which also took the better of him in the past. He finds that every improvement starts with himself, find the things you love to do, don't worry too much about the past and the future as it is not yours to control. Don't give in too much to negativity, and in the end not even noticing his wife has been next to him all the time. He then finds that he is heading back on the right path of what he used to be (as a child) by letting go all of this.
Hope it makes sense! If there are still unanswered questions, let me know, I'll try to fill the gaps