I suppose that the savage or the barbarian or the peasant in any part of the world or the uneducated man anywhere would laugh if you told him that the adult must still learn. But in our modern world--I mean the more or less civilized world of the last twenty-five centuries or so--there has grown up a new idea--new, I mean, in the sense that it runs counter to the life scheme of primitive humanity and of most other living things--and that is _the idea that one can go on learning right up to the end of life_. It marks off modern man from all animals, that in his adult life he can display a sense that there remains something still to be investigated and wisdom still to be acquired. I do not know enough history to tell you with any confidence when adult men, instead of just going about the business of life after they had grown up, continued to devote themselves to learning, to a deliberate prolongation of what is for all other animals an adolescent phase. But by the time of Buddha in India and Confucius in China and the schools of the philosophers in the Greek world the thing was in full progress. That was twenty-six centuries ago or more. Something of the sort may have been going on in the temples of Egypt or Samaria a score of centuries before. I do not know. You must ask some such great authority as Professor Breasted about that. It may be fifty or a hundred centuries since men, although they were fully grown up, still went on trying to learn. The idea of adult learning has spread ever since. To-day I suppose most educated people would agree that so long as we live we learn and ought to learn--that we ought to develop our ideas and enlarge, correct and change our ideas. But even to-day you will find people who have not yet acquired this view. You will find even teachers and doctors and business men who are persuaded that they had learnt all that there was to learn by twenty-five or thirty. It is only quite recently that this idea has passed beyond a special class and pervaded the world generally--the idea of everyone being a life-long student and of the whole world becoming, as it were, a university for those who have passed beyond the schooling stage. It has spread recently because in recent years the world has changed so rapidly that the idea of settling down for life has passed out of our minds, has given place to a new realization of the need of continuous adaptation to the very end of our days. It is no good settling down in a world that, on its part, refuses to do anything of the sort.