Oh, but he also "recognizes" that he's brilliant, the two realization should exactly cancel each other out...
While it might do wonders for one's self-esteem, being called "brilliant" by high school teachers doesn't impress me much. In contrast: If Brian Eno says someone is brilliant, I am quite likely to take his word for it.
I'd further mention that many people unconsciously choose to not be brilliant because this allows them to fit in.