When we become aware of our negative attitude, why don’t we change it?

Human generally resists change. Change is uncomfortable. Sometimes we get so comfortable with our negativity that even when the change is positive, we don’t accept it. We simply stay with negative.
There was a prisoner who had spent many years in prison. After a long time, he received his freedom. He was brought out of his cell. When he came out, after a few minutes, he was so uncomfortable with the change in his life that he requested to be sent back to his dark cell.

(From a book "YOU CAN WIN" by "SHIV KHERA:)