I do find learning new things fun and... what's the word?... motivating. Exhilarating, even. It's like a drug to me. And I'm always in need of a fix.
But then, it's true: I don't try to build an airplane when I just learned about gravity. Besides, not even knowing what type of airplane to build (despite loving all things airplane) is a clear sign I'm not ready for that yet. Maybe there's more I need to learn.