Identify and explain the thematic significance:

1. This work will be found to be lacking in prefatory sonnets by dukes, marquises, counts, bishops, ladies, and poets of great renown.
   
   
2. This was the place we reached; the ditch beneath
   held people plunged in excrement that seemed
   as if it had been poured from human privies.
   
   
3. This is the badge of false faith that I was found in there,
   And I must bear it on my body till I breathe my last,
   For one may keep a deed dark, but undo it no whit,
   For where a fault is made fast, it is fixed evermore.