Who can teach when there are such lessons to be learned

It is not enough these days to simply QUESTION AUTHORITY. You have to speak with it, too.

That's what teaching is, the art of explanation: presenting the right information in the right order in a memorable way.

Who can teach when there are such lessons to be learned

Simply put, the best teachers are the ones you work your tail off for because in the end you just don't want them to think any less of you. You want and need their approval.

The best teachers that I had were always the ones I never wanted to disappoint.

The only thing that surprises me is the characterization of teachers as lazy and greedy. Only someone with very little understanding of what teaching requires would say such a thing.