Say, rather, the ten-step Christian program, for we who are not Catholic embrace the same principles.
On the one hand, I sometimes regret the brevity of ordinary human life, because one lifetime is not enough for all I want to do--all the careers I would have liked to have, all the good works I'd like to undertake, all the subjects I would like to study, all the places and people I'd like to experience. But many times, times especially when I'm tired and down, I long to escape the heartbreaks of this life and see my Heavenly Father and all the loved ones who have already died. Many old people have told me that the idea of approaching death is almost sweet for the same reason.
Think, also, of how people would be psychologically after enduring a millenium of disappointments, heartaches, tragedies, losses! These are inevitable in life and most of us have about all we have the strength to bear; enduring them for centuries would change us in ways we can't imagine.
Which leads us speculation about the character of people who live for a millenium. If most people had no fear of death, no fear of being judged, would they make any effort to behave decently? I doubt it. More people are motivated to good behavior by fear of judgement than by the hope of drawing ever-closer to the Lord.
So imagine a world filled with psychologically old, physically young people, all of whom were so selfish that they would choose to forsake bearing children for their own pleasure. Not an attractive picture, is it? I don't want to live in a world like that, much less to live too long past 100.