Great article, thanks for sharing! This really resonates with me for obvious reasons, and I think, begins to explain how I've been able to find and maintain happiness. I think a couple of months ago when shit was really hitting the fan with my marriage, I went through a process where I actively tried to "reset" my brain in a way that is in the same spirit as this article. To strip away expectations that are tied in with other people. Happiness is found in living in the moment, not getting hung up on what you think should or needs to happen tomorrow.
When you adopt that mindset, it is remarkably easy to be happy in the middle of a storm.