Great point. It's said that people who have built their success on their intelligence look for opportunities to learn all their lives and use the joy of learning to keep their brains active and nimble well into old age.

One of the best things I've learned in my life, a bit late but hopefully not too late is that if you learn to motivate yourself the only other barriers to learn something you will ever face are your own desire and time. Though at least time can be partially dealt with through learning proper time-management!

P.S. And the best way to learn motivation, it turns out, is to teach others just like you're doing right now :)