It is expected that, when you've been raised as a jw with the fallacious notion that you're "designed" to live forever, once you've realized that this simply isn't true, what comes after is a bit weird: You learn that you have only one life in a much older age than it is normal to do so.
This brings problems. In one of the last jw funerals that I attended, I was astounded by the excessive grief that everyone had, despite the fact that the late jw was far over 90 years old, and had died of natural causes, without any pain. Then it stroke me that that was because jws never reconcile with the idea of death. They are all sure they will live forever, they are SURE that death isn't natural, and when death comes, even in a 100-year-old, it always comes to them as a complete surprise, like they can't believe it.
A person really starts to live, as a grown-up, from the moment they realize there's no second life. An ordinary person realizes that at his adolescence, give or take. Most devout jws never realize that, which means that they essentially remain children until very, very late.