What is literature & How it shaped me?

From last five years, I am reading literature and from that I come out as mature person. To reading literature is an intellectual activity, we have to think, connect and understand it. Through reading literature I can able to know about various behavior of person, able to know the human emotions and how to control it, etc. So, I can say that it is helpful to me.

But there are some questions raised in my mind regarding it. The person who can write best book of literature, obviously his/her understanding is very high and yet they commit suicide, why? Person who knows everything that what to do, and what not to do, after knowing both the things also they are doing wrong things, why?

There are also some things regarding literature that when we don't know about deep understanding of literature at that time we are ok. But after knowing the harsh realities of our society through literature, we can't live life easily because it gives us uneasiness and in that point it proofed that "knowledge is course". We know everything that these many things are wrong or harmful for society and yet we are helpless. We can't do anything. And perhaps because of this reason some writers commit suicide.

Literature leads us to be wiser but with that uneasiness also come.

Literature is like hammer or potter which moulds our personality.

It works like "Karela" that its taste is bitter but it is sweeter for health.

Only the very weak-minded refuse to be influenced by literature and poetry.

- Cassandra Clare,