Emphasis on autonomy of texts presupposes that there are perennial concepts. But researchers' expectations may turn history into mythology of ideas; researchers forget that an agent cannot be described as doing something he could not understand as a description, and that thinking may be inconsistent. They will never uncover voluntary oblique strategies and by treating ideas as units will confuse sentences with statements. On the other hand, a contextual approach to the meaning of texts dismisses ideas as unimportant effects. Neither (...) method shows how what was said was meant is crucial for understanding. There are no perennial problems; philosophers of different times do not speak directly to us. But history of ideas helps us recognize the contingency of many of our beliefs. (shrink)