6178   hardness of heart
     8355   understanding
     8761   fools, in teaching of Christ

Mark 8:14-17

     2045   Christ, knowledge of

Mark 8:14-21

     4554   yeast

Mark 8:16-21

     4418   bread

Mark 8:17-18

     5962   surprises
     8319   perception, spiritual

Mark 8:17-21

     1466   vision
     2570   Christ, suffering
     8281   insight
     8832   testing
     8837   unbelief, and life of faith