He has little self confidence and little self-worth because of his lack of intelligence. He looks up to the adults in his life as godlike people who are far above him in status. After the operation, as he becomes highly intelligent, Charlie gains self-confidence and begins to see the other adults around him as peers.
“He talks” is a sentence fragment. The word he talks doesn’t show anything. If the sentence was like “He talks like a girl”, it’ll be a complete sentence.
