As with all great teachers, his curriculum was an insignificant part of what he communicated. From him you didn't learn a subject, but a life. . . Tolerance and justice, fearlessness and pride, reverence and pity, are learned in a course on long division if the teacher has those qualities.
The big question about how people behave is whether they've got an Inner Scorecard or an Outer Scorecard. It helps if you can be satisfied with an Inner Scorecard.