You shouldn't hurt others by judging them too harshly.
Daniel's son has come home from school and got a B on a paper.
Daniel wants to talk to his son about the grade.
Daniel tells his son that a B is good, and he can aim for an A on the next paper.
Daniel tells his son that a B is a bad grade and people that get Bs are bottom tier.
Daniel's son will want to achieve an A.
Daniel's son will feel that he isn't worth much.