The bone that has no marrow:

The bone that has no marrow;   
  What ultimate for that?   
It is not fit for table,   
  For beggar, or for cat.   
 
A bone has obligations,                  5
  A being has the same;   
A marrowless assembly   
  Is culpabler than shame.   
 
But how shall finished creatures   
  A function fresh obtain?—            10
Old Nicodemus’ phantom   
  Confronting us again!