Naivety is sort of the counterpart to pretending things don’t exist, except that naivety sees no problem, and pretending things don’t exist is ignoring a problem.
In A Tale of Two Cities, Monsieur the Marquis is a naive man of nobility, believing that “repression is the only lasting philosophy.” Ironically enough, the marquis says this during the Age of Enlightenment, where philosophies based upon reason and individualism were stressed upon the Europeans. The marquis lives in his own lavish, opaque bubble, and any interaction with people he has, he remains in his bubble not properly absorbing his experiences. You can tell he’s not fully aware of the things going around him when he denounces the death of the child by recalling the events in his day rather than mourning or feeling guilty. He acts as if he was invincible, but his invincibility was cut short with a knife that turned him to stone.