Everyone surely feels the weight of the virtue in that. The master exemplifying the need to be a perpetual student. Even mentioning it feels like cheapening it or lessening its significance. There is something to the old idea that makes its way idiomatically into most cultures and most times. It could be there is some of the same stuff (stuff is a technical word – look it up) in the idea on the other side of that age coin - that youth is wasted on the young. Even that legendary martial arts trainer Sensei Mark Twain once quipped how at fourteen years old he thought his father was ignorant and at twenty one he was amazed at how much old dad had learned in seven years. Before you suggest Twain was not a Sensei, you might want to also check if that quote wasn't apocryphal too. Mandela effect much?