Answer: The first 4 lines is the first quatrain, the second 4 lines is the second quatrain, the third 4 lines in the third quatrain, and then the last 2 lines is the couplet.
At the end of Sophocles' Oedipus Rex, the protagonist Oedipus has gouged out his own eyes and is sent into exile. His wife (and -- spoiler alert -- his mother) is dead, having hung herself.
I believe it is She knows that he has made the only decision that will satisfy his soul but im not completely positive.
