Fanaticism is overcompensation for doubt.
Quotes about overcompensation (3 Quotes)
Is not the tremendous strength in men of the impulse to creative work in every field precisely due to their feeling of playing a relatively small part in the creation of living beings, which constantly impels them to an overcompensation in achievement.
Curly was very introverted and he drank a lot, and that's when he would come out -- either that, or in a performance, ... But he would hang with his stray dogs. And he was a big womanizer. I think it was overcompensation for being bald and heavy, and acting like a buffoon. He wanted to feel attractive.