".... And that's what it was all along."
"What? who? I don't get it"
he explains to her that dreams tend to imitate reality by reminding you of memory sequences, and doesn't directly affect it. Dreams are a side effect of your experiences, but a world inside your mind when you sleep. not everyone gets to see this world because some are born without the ability to dream; but if you can dream, you aren't one of them.
And that's what it is 🙂