Mrebo said:
Then his overconfidence was truly his weakness!
To me, the story completely validated his performance. It wasn't simply that he wasn't smart enough, nor that the Jedi were clouding his Force powers, it's that he was so unbelievably confident and had gotten to a point that he was simply out of touch with his own ability to persuade.
Clearly his overconfidence is his weakness to me....
...but how can that be if he doesn't even ultimately care whether or not he can turn Luke? Not much confidence in that. I guess you can say that he's just overconfident in his control of vader....but that makes his realization less poignant to me.