I violated the education of my father and brother, and failed to live up to the discipline and teaching of my teachers and friends. Now I have a good skill and live a poor life all my life. This is my own sin.

This sentence expresses remorse and self-blame, thinking that he did not listen to the teachings of his family and society, which led to his failure and poverty. It emphasizes personal responsibility and self-discipline, as well as gratitude for family and social support.