You know the feeling when something finally clicks? I know you know it. It’s the lightbulb that turns on. It’s the moment you scream, “Eureka!” It’s one of those images you hold close to your face, slowly draw it back to reveal an image, but the first ten times you try it doesn’t work. Then, on the eleventh try, you see that rhino, and it’s the most incredible rhino anyone has ever seen.