You shouldn't intentionally hurt someone's feelings.
Chris is a teacher and his student has been consistently late for school for a year.
Chris wants to teach his student a lesson for being late.
Chris has the student do character building exercises in a kind way.
Chris decides to shout at his student to lower his self-esteem, so he isn't late anymore.
Chris' student becomes less immature and tardy, and Chris feels proud.
Chris notices his, 'lesson', didn't work and his student was still coming in late.