If you cage an animal and treat it cruelly for long enough, it will eventually accept it as its new reality. The same can be said for people.

[Nil's seen it. In the dark, hot cells of Sunstone Rock, where he had heard one prisoner after another slowly lose his mind to the sun. Nil himself had gone a different way entirely, if you'd believe the words of the prison warden, but some people might think the way that he went was worse.]