If you'll notice the first four lines are a mixture of positive and negative: Negative, Positive, Negative, Positive. So in essence a rising from negativity into positive thought.
The second grouping is pure negative. As in a falling back into old ways that only harmed.
The third grouping is again a mixture of positive and negative: Positive, negative, negative, positive. This grouping is about a rebirth of hope - rising out of the darkness again and into the light. But with every rise comes a struggle. Unlike the previous mixture of positive and negative, this mixture starts with a positive, sandwiches two negatives, and ends with a positive.
The final grouping ends in only positive - indicating that the finality of the emotional story is eternally good.
So this, while generic in appearance, has subtle tones to it of a story of sorts. A journey that people go through (although all not with the same results).