One’s 50’s and 60’s
In one’s 50's one has the strength for a final accomplishment. You still have some power. All your realizations and evidence has been gathered. Your thinking has become honed.
In your 60's this need to accomplish diminishes. One’s needs become important. Just staying alive returns one to more basic concerns. Escaping the accumulated pain of life through pleasure takes precedence over sacrificing for a larger vision. These factors don’t eliminate the need to accomplish, but they have to be taken into account.