I don’t really know who Carl Jung is. I mean, I know of him, but I don’t really know him. Nor do I know much about the field of psychology. So, I’m just throwing this out there as a quote of his that I like, with not much context:
“Thoroughly unprepared, we take the step into the afternoon of life. Worse still, we take this step with the false presupposition that our truths and our ideals will serve us as hitherto. But we cannot live the afternoon of life according to the program of life’s morning, for what was great in the morning will be little at evening and what in the morning was true, at evening will have become a lie.”
I think it’s hard to know what it’s like to be an old person until you are an old person. Also, an old person, having been young, knows what it’s like to be young. But a young person, never having been old, cannot know what it is like to be old.