One hears with silence
Das Wort schallt mehr in dir
  The    word       resounds    more    in   you
     als in des anderen Munde;
        than  in   the  other’s           mouth;
So du ihm schweigen kannst,
  So (to the extent) you to him be silent can, (be silent before him)
     so hörst du es zur Stunde.
         so (to that extent) hear you it at the moment (when it happens).