The truth is, when all is said and done, one does not teach a subject, one teaches a student how to learn it. - Jacques Barzun

Teaching is not a lost art, but the regard for it is a lost tradition.

History, like a vast river, propels logs, vegetation, rafts, and debris; it is full of live and dead things, some destined for resurrection; it mingles many waters and holds in solution invisible substances stolen from distant soils. Anything may become part of it; that is why it can be an image of the continuity of mankind. And it is also why some of its freight turns up again in the social sciences: they were constructed out of the contents of history in the same way as houses in medieval Rome were made out of stones taken from the Coliseum. But the special sciences based on sorted facts cannot be mistaken for rivers flowing in time and full of persons and events. They are systems fashioned with concepts, numbers, and abstract relations. For history, the reward of eluding method is to escape abstraction.

If they leave college thinking, as they usually do, that science offers a full, accurate, and literal description of man and Nature; if they think scientific research by itself yields final answers to social problems; if they think scientists are the only honest, patient, and careful workers in the world; if they think that Copernicus, Galileo, Newton, Lavoisier, and Faraday were unimaginative plodders like their own instructors; if they think theories spring from facts and that scientific authority at any time is infallible; if they think that the ability to write down symbols and read manometers is fair grounds for superiority and pride, and if they think that science steadily and automatically makes for a better world — then they have wasted their time in the science lecture room; they live in an Ivory Laboratory more isolated than the poet's tower, and they are a plain menace to the society they belong to. They are a menace whether they believe all this by virtue of being engaged in scientific work themselves or of being disqualified from it by felt or fancied incapacity.'''