Instead, I propose that he's been breathing different oxygen for so long that he's long since started believing his own legend. Frankly, I just don't believe that he has anyone in his life who would serve as a grounding influence, and I find this really sad.
Anyhow, I jumped into the thread because I find calling someone demonstrably brilliant an "uneducated, delusional moron" might feel good but it distracts from the real discussion.