Teacher can abuse their students but student can't abuse or fight back. The temperament of the student during heated argument is more important than the knowledge of the student. Teacher may be ill educated or misbehaving but the student should respect him at all cost. If a teacher is unable or not willing to give knowledge to the student, he can not be judged as poor teacher. But a student who don't perform his duty such as respecting teachers and seniors, studying well, making efforts in his goodwill then he is a poor student.

Parents - children, husband - wife, teacher - student, money giver - money taker, abuser - punisher , good- bad etc are like white & black and they exist independently, howeverone can effect another but doing so, another do not get right to effect the same away.