Richard P. Feynman was a famous physicist: he worked on the atomic bomb project, received the Nobel Prize in physics and made science a topic of popular culture. But above all he was a teacher, as his daughter, Michelle Feynman, writes in "Perfectly Reasonable Deviations from the Beaten Track: The Letters of Richard P. Feynman." Lawyers too, I believe, are as well—whether to other lawyers, judges, juries or fellow citizens. You don't need the title of professor to be one! So to start off 2021, let's look at what it means to be a teacher, for Richard Feynman illuminates much for us.