A recent PhD Comic forcibly expressed the general idea:
Apropos the value of teaching, this is what Barzun said, with his usual irony, in The House of Intellect: “To bring new and valuable knowledge by lecturing before fifty or a hundred students a year is not research, for it is not publication, except in the legal sense. But to print such knowledge in a periodical where only a few will peer at it with skepticism or dismay—that is to enlarge human horizons, to make the university shine in a new glory, and to justify an early promotion.”
