How did Windham Earle know to invert that petroglyph lever in Owl Cave? Why didn't Cooper turn it upside down? Did turning it upside down open the Black Lodge as opposed to the White Lodge? I have always been confused by this. It may be a very obvious easy answer that I am just not grasping. Can someone verify what went down in this scene?
"Harry, I'm going to let you in on a little secret. Every day, once a day, give yourself a present. Don't plan it, don't wait for it, just let it happen. Could be a new shirt at the men's store, a catnap in your office chair, or two cups of good, hot, black coffee. Like this." -Dale Cooper