The single most important thing that adds to one's life is education: an adding of workable knowledge that permits one to better manage one's life and to harvest all of what one wants, and, of course, knowing what it is that one truly wants.
Is there a limit to what we want to learn?
Is there a limit to how well you want your life to be?
I suggest that we just keep on adding workable knowledge - and adding in a systematic way with proper expertise, so that we learn most effectively.
And, of course, we would, as we are journeying through life, be harvesting our lives, living in balance - and we would not just be learning for just learning's sake, like some intellectually fun thing (which is ok if fulfilling, but is not the goal).
We would be learning for life's sake, either enjoying a particular area of learning (as a recreational thing) or learning something that enhances our lives in some way (even job skills will add value plus confidence for a better life).
But those who do not even develop the base, who have not learned the vital basics will be adding on to an unstable structure.
The sister site on educating about life is TheLifeUniversity.com, which will be reformatted to some extent and developed more, but which has some valuable insights and oversights.