I don't know that he meant to teach me a lesson. I think it was just a mentalist-style magic trick, not unlike pulling a quarter out of a kid's ear. Just for fun.
I guess it was useful to know people are alike enough to be predictable, but I don't think he was trying to teach me that necessarily.
Unfortunately I also have to interpret everything through the lens of, "He's an insecure narcissist, so he might just have been trying to keep me in line by proving he was smarter than me." Things changed a lot after this event. He intensified his efforts to isolate me from other people, even convincing my own mother I was so much smarter than her that she would never understand me. I was a three-year-old child. I don't care how smart you are when you're 3, most of what you need at that point is basic and common among all humans. But this gets back to seeing me as a threat to his own sense of safety, thus trying to make sure I felt small for the rest of my life.
I guess it was useful to know people are alike enough to be predictable, but I don't think he was trying to teach me that necessarily.
Unfortunately I also have to interpret everything through the lens of, "He's an insecure narcissist, so he might just have been trying to keep me in line by proving he was smarter than me." Things changed a lot after this event. He intensified his efforts to isolate me from other people, even convincing my own mother I was so much smarter than her that she would never understand me. I was a three-year-old child. I don't care how smart you are when you're 3, most of what you need at that point is basic and common among all humans. But this gets back to seeing me as a threat to his own sense of safety, thus trying to make sure I felt small for the rest of my life.