According to St. Thomas Aquinas, “all evil is an absence” - all evil is deprivation. And in the light of this explanation here you understand that it really is so, because the human being has a true nature. This nature is permanent, it is immortal, it infinitely transcends your circle of bodily existence and it is something you cannot reject.
So, that is why the Church says that “those who go to Hell, go by their own choice”. The Monseigneur de Ségur - in a book called L’Enfer, which is a very important book, a fifty-page book - he reports several cases of people who appeared after they were dead (they appeared to others) and said: look, I’m here in Hell for a righteous sentence from God. That is to say: the condemned to Hell does not rebel against his situation - he accepts it. Which means that this decrease was, in a way, voluntary - if maintained until the end.