One of the things that impressed me the most from the book Call Sign Chaos: Learning to Lead by General Jim Mattis is that Marine officers are given assigned reading which must be completed before moving on to the next level.* If you spend a lifetime in the Marines, you will spend a lifetime learning about leadership and history.
What would happen if I chose to stop learning? Would I become the guy who could not adapt to the times, because I could not recall the past or prepare for the future? Would I become a dinosaur making way for the next dominant species?

Considering Asimov’s words that we are never finished with our education, I am reminded of so many others who have uttered similar words. It is imperative that we continue to learn. It doesn’t matter if it is formal or informal, there is so much waiting to be discovered and applied. We are never too old or too young. The only limitations we set on our studies are the ones we set on ourselves.
Gather as much knowledge as you can. From that knowledge, draw your correlations and seek understanding. From this comes wisdom. There is an unlimited supply to how much you can gather, but only if you are willing to make the effort.
*I am still reading this book and promise to return it to the owner as soon as possible.