Teachers and Students...

At what point does the teacher step back and let the student go on their own and stop critisizing the student and judging them? Does that ever happen or does it always stay a teacher/student relationship? what if there was no student/teacher relationship before hand and they were relatives or friends, will it go back to that or will it stay as a teacher/student?

Does the teacher not realize that they could learn just as much from the student as the student is from the teacher? Does the teacher get a complex after the teachings that they think they now have to constantly teach it to everyone?
Does the teacher think that just because they taught it once they will never have to keep up to date with it?

To teach or not to teach...

hmmm??