The Third Dimension by Denise Levertov

"The Third Dimension" is the description of a feeling a person feels after they have been put through a rough situation.  It is the feeling you get the next day after an intense fight that ended in a parting of ways or the death of someone close.  Everything keeps going on, traffic, rain, the sun comes up, your boss wants you on time to work, the dog still needs to be fed, and you feel like you don't want to join in all of the hustle and bustle of the day.  You see everything as if you were in a third dimension, but when someone approaches you to say "How are you?," you go ahead and give a standard response, "good," as is felt by the following final verses, 

and I'm
alive to

tell the tale--but not
honestly:

the words
change it. Let it be--

here in the sweet sun
--a fiction, while I 

breathe and 

change pace.