The question of manuscript changes is very important for literary criticism, the psychology of creation and other aspects of the study of literature.
Umberto EcoHe who laughs does not believe in what he laughs at, but neither does he hate it. Therefore, laughing at evil means not preparing oneself to combat it, and laughing at good means denying the power through which good is self-propagating.
Umberto EcoThere is only one thing that arouses animals more than pleasure, and that is pain. Under torture you are as if under the dominion of those grasses that produce visions. Everything you have heard told, everything you have read returns to your mind, as if you were being transported, not toward heaven, but toward hell. Under torture you say not only what the inquisitor wants, but also what you imagine might please him, because a bond (this, truly, diabolical) is established between you and him.
Umberto Eco