Are you done?

I read this quote below this morning, and it really impressed me. No matter what your age, are you still learning? Think about it...  

”For every man, education should be a process which continues all his life. We have to abandon, as swiftly as possible, the idea that schooling is something restricted to youth. How can it be, in a world where half the things a man knows at 20 are no longer true at 40—and half the things he knows at 40 hadn’t been discovered when he was 20?” - author and inventor, Arthur C. Clarke