Its amazing how mind control works. Here are these folks who give at least half of their spare time to the b0rg if they follow the full program laid out by the Watchtower. And what do they do with this time? The same thing over, and over, and over, and over.
Same routines, same "food" over and over. No birthdays, no holidays, no entertainment that crosses whatever invisible line that the WT sets, no worldly association, severe limits on education, limits on hobbies (lest they slack off in "spiritual activities") limits on family association (non believers or DFd) no kinky sex, no p0rn, it goes on and on and on...
Yet they completely and totally believe that they are "blessed" to some high degree, that they are "happier" than the world while they reach to pop their antidepressants.
You can't "reason" with people who think like this. What blessings is right, but don't bother telling them that.
Oh and on the question of the "past" here is one for them to consider. Ask them what common thing has affected every living creature in the "past"? Since the dawn of man and animal, every single thing has died. A harsh fact proven every single day. Yet they think they are going to be the one exception to this 100% never-wrong rule.