Make sure you read it ... several times. Once is not enough.
THEN ... make note of every line in which you find "positive sides" and every line in which you find "negative sides" -- and put those line numbers in different columns.
Go back and reread all the positive-sides lines. What do these lines have in common with each other?
Go back and reread all the negative-sides lines. what do these lines have in common with each other?
Let us know what you come up with.