Several years ago I had a Latin professor who made us memorize a phrase that it has been in my mind ever since. The Latin expression is “magister meus doctus est” and means “my professor is instructed or wise.” Obviously, my Latin professor was teasing when he made us memorize that phrase, but in reality, those words describe an important and profound truth. Everybody expects that professors are wise enough to guide their students. It has been commonly assumed that only those who know more can lead others in the right path because we know that nobody can give something without first possessing it. I have been a teacher in different countries and settings for twenty years now and I can testify about the accuracy of this general perception.