I have seen that college, school and a general formal education dulls the mind giving the person a sense of cockiness. Compare that to somebody who has not had “proper”, formal education. He would have a more keen mind and a mind more attuned to learning from every single experience.
I am sure all of us have heard the critical voice inside our heads. The voice that says- “I can’t” or “I am weak” or “I am not good enough” etc. etc. The worst critic and probably the most influential one we can ever have is this critic inside our heads. Next time you hear that voice do this. Assign a face to it. (could be yours, your friends, boss or even a dog) and SLAM a PLATE FULL OF VANILLA ICECREAM INTO THIS FACE. Make it into a cartoon charecter and add funny cartoon music. Have a puppy dog come and generally pee on this face. Make it look ridiculous. Add a looooong nose or BIG ears. Suddenly you will find that the power of the inner critic over you is gone. Use it whenever this guy speaks up.