These two works express their ideas in very different ways and with very different details, structures, and styles.
That's like saying that Orwell's 1984 is a plagiarism of Yevgeny Zamyatin's We or that Harry Potter is a plagiarism of Ursula K. Le Guin's Wizard of Earthsea.
You are just tackling similar topics. Maybe he took some inspiration from you. You should be proud instead of being butthurt for 15 years.
By the way, the notion that all beings are manifestations of a single consciousness—or that we are all God—is far older than either of you.
I think the concept is a common insight among people who introspect a bit. The first time I read the story I was surprised because it closely mirrored one of my own musings. In retrospect that’s probably because it is one of those “obvious” ideas that presents itself from the memetic environment of the moment. That’s also probably why it’s irritating to Weir that it practically became a religion lol.
