" M.R.: In the humanities certain professors spend their time in effect teaching their Ph.D. thesis.
N.C.: Anybody who teaches at age fifty what he was teaching at age twenty-five had better find another profession. If in twenty-five years nothing has happened which proves to you that your ideas were wrong, it means that you are not in a living field, or perhaps are part of a religious sect. "

― Noam Chomsky , On Language