“Speaking a lot about something does not in the least guarantee that understanding is thus furthered. On the contrary, talking at great length about something covers things over and brings what is understood into an illusory clarity, that is, the unintelligibility of the trivial. But to keep silent does not mean to be mute ... one who is mute still has the tendency to "speak." ... Authentic silence is possible only in genuine discourse. In order to be silent, Dasein must have something to say.”