German philosopher Martin Heidegger stirred educators when in 1951 he claimed teaching is more difficult than learning because teachers must "learn to let learn". However in the main he left the aphorism unexplained as part of a brief four-paragraph, less than two-page set of observations concerning the relationship of teaching to learning; and concluded at the end of those observations that to become a teacher is an "exalted matter". This paper investigates both of Heidegger's claims, interpreting letting learn in the context of Heidegger's larger philosophical project, and suggesting why in light of that project to become a teacher is an exalted concern. The methodology guiding the inquiry is largely hermeneutic, the purpose of the essay to interpret teaching from a Heideggerian perspective: its nature and general method.