The quote isn't about his temperament but his knowledge, so I think that interpretation is a bit of a stretch. I think the same kind of quote would absolutely

The quote isn't about his temperament but his knowledge, so I think that interpretation is a bit of a stretch. I think the same kind of quote would absolutely apply in exactly the same way to temperament though. The 14 year old thought his dad was a jerk who mellowed out by the time he was 21, the reality again being that the biggest change was actually the child's temperament.