A merge field can be used multiple times in the same document.

i don't see it in your profile.                                                  

edwards uses the phrase "o who can express what the state of a soul in such circumstances is! " in order to illustrate that this type of suffering is unimaginable. the word "express" denoted that the state of a suffering soul is required to be described by any person, but it would not happen because no one can imagine how this suffering is felt.  

-show what might happen if the reader disobeys edwards is not correct because this is described trhough the text, not by the phrase used.

-describe what endless suffering looks and feels like is not correct because this description might be the porpuse of the excerpt provided, not the porpuse of using the phrase during the writting.

-prove that few people have survived limitless suffering is not correct because it is implied that the soul of a person is already suffering and doesn't have any way to escape.

stopping by woods on a snowy evening" is written in a very deliberate meter and rhyming scheme. first, the meter is iambic tetrameter, meaning that each line is composed of four iambs, or "dadum" syllables. this is clearly seen in the first lines of the poem: whose woods these are i think i know.

hope this