Addendum: None of us are infallible or have all the answers. A good instructor is the one who is also the best student. Hopefully a student returns and teaches us something they built on our knowledge. The bad instructor is the one who's lesson plan for English literature can be recited by your older brother and parents.I once listened to a talk by the Dalai lama. he quoted a scripture. A young monk said he had misquoted it. There were scowls from the senior monks as his holiness continued to lecture. Suddenly the Dalai lama broke into laughter." Oh,Oh, you were right, I was wrong!"<br><br>