What Brother really wants is a "normal" sibling. Thus, he sets high goals for Doodle because he doesn't want a "crippled" brother. At first, this seems admirable because Brother is able to teach Doodle tasks that no one ever thought he would be able to do. But as the time for Doodle to enter school gets closer, Brother's demands become even greater. Brother does not want the other children at school to make fun of him or Doodle. So, he demands too much from his brother and his brother dies of exhaustion.
Brother in the time the story happened is very young. He aspires to do many things and thinks himself to be talented and powerful. He mentions proudly in the story the list of things that he is able to do and says that he wants his brother to be capable of doing them. As his brother Appeared to be invalid Brother is disappointed and the huge contrast between the two brothers created a gap between them which Brother tries in the begining of the story to remove by trying to kill his brother. But Brother discovers another way which is to teach him. As the time passes the begining of school approaches so Brother demands more effort from Doodle. Being so fragile Doodle collapses. Brother tries to remove the gap between them by setting goals and urging Doodle to Achieve them.