Tell me what benefited you a lot.

My teacher once said: Don't play with ignorance. Go to school if you don't understand. You won't know how terrible ignorance is until you can stand up and be a man! Ignorance is the lack of this world, but we should crustily skin of head and pretend that we don't know anything and that we are inscrutable. When the cowhide is uncovered, people hate ghosts. Even after a period of time, you will hit a wall everywhere, and often do bad things with good intentions. As the teacher said, learn if you don't understand, enrich your knowledge and apply it freely in life, so that you can be comfortable in life.