The darkness of your sight

This is about a mother telling her son that she cares about him when he cries. She tells him that the whole world is filled with knowledge and enthusiasm and you need to receive it but she also conveys that because of his 'crimes' here crime means the work which is not acceptable and unsatisfactory, she also tells that the another character had no knowledge about the life which is described as ' darkness of your sight' she has a pity to see his son like this and tells him to work hard to bring a smile on his face..