Long time ago I was taking a CS course and the instructor told us that he will be the second best reacher we will ever have, which of course left us wandering who will be the best? ourselves? some archetype role model?
He ended us saying that the best teacher we will ever have is and will be Google, he will be able to teach whatever subject much quicker that anybody else, so he will aspire to be our second best teacher.
Since then, I have been trying to become the second best teacher for all my students =)