For all the best teachers pride themselves on having a large number of pupils and think themselves worthy of a bigger audience.
The one exclusive sign of thorough knowledge is the power of teaching.
I've come to realise that the best teachers never stop being teachers.
Just as the great composer is seldom also a great player, so is the great mathematician seldom also a great teacher.
Teachers are not glorified babysitters with summers off. Their profession fuels all others, and on a normal day that is amazing enough in and of itself.
When you see a great teacher, you are seeing a work of art.
Faulkner turned out to be a great teacher. When a student asked a question ineptly, he answered the question with what the student had really wanted to know.