But to know means to be able to stand in the truth. Truth is the openness of beings. To know is accordingly to be able to stand in the openness of beings, to stand up to it. Merely to have information, however wide-ranging it may be, is not to know. Even if this information is focused on what is practically most important through courses of study and examination requirements, it is not knowledge. Even if this information, cut back to the most compelling needs, is “close to life:’ its possession is not knowledge. One who carries such information around with him and has added a few practical tricks to it will still be at a loss and will necessarily bungle in the face of real reality, which is always different from what the philistine understands by closeness to life and closeness to reality. Why? Because he has no knowledge, since to know means to be able to learn.
Heidegger, “Introduction to Metaphysics”, p. 23 (Yale University Press)