名词解释：文学的核心性质

If I can come back to the past, I would prefer you did not know, I did not regret it now, at least I can now not to face, not your outcome.
Separation can not be friends again, it is because their injuries are too. Hurt each other because each other.
But will not become the enemy, it is because we have been together in love, at the end of two people on this has become a most familiar of strangers.
Some, however, always feel that when you lose, no matter what allows me to also concerned about their own tears are so turbid unclear, even I have a shadow of a smile.
Looking back to look at
Love then the original injury
This will not be next!

文学的核心性质
个人感觉应该是文学对经济社会发展做起的作用

先确定是哪本书里出来的。文科类的说不清楚的，如果只是应付考试，对症下药比较合理。