Chris Mahan submitted a fairly detailed graph about how an individuals goals change as they progress through life.
As a kid, you slowly realize that, yes, you can accomplish anything you can dream of.
Then you hit high school and that inspirational mindset gets replaced with phrases like “This is boring” and “Whatever.”
When in college, people begin to develop skills in their chosen field of study and with those skills come the ideas of how to utilize them.
Finally, you graduate and you are released into what they call “the real world” and upon arrival, you sit down at your cubicle and slowly lose the desire to reach past that middle management position you probably won’t even get anyway.
Eventually, you decide you might as well settle down and get married. Not long after the honeymoon do you realize that all those goals (the ones you had left) are now simply out of the question.
However, upon retirement, a certain amount of freedom is restored as you grab your things (and your spouse) and hop in the RV to go travel the (contiguous) world, to see and experience all those things you dreamed about when you were a kid.