Board Thread:Warhammer 40k General Discussion/@comment-6078851-20130130174042/@comment-3258762-20130312133836

He was too intelligent. It is the same with his utter hatred of religion, he could not see any reason to have it for he had never been faced with anything he could not understand (being so darned intelligent)

This also meant he acted less on his emotions and often times (but not always) acted on logic and became very insensitive.