when should we stop learning?

 High School? Bachelors Degree, Masters, Doctorate. For me its never over because the the more I learn the more I realize I don't know. This may sound very Buddhist and although it is, it is also very true. I am reading a book that says understanding history isn't knowing facts and dates its truly about, uncovering issues, arguments, and theory's so the more we learn the more we realize how connected our world is. The history I learned in school was so compartmentalized and one sided its like teaching that when you run a marathon the only muscle being worked is your hamstring?