Here are two men:
One is obsessed with nature. He studies it. He observes it. He quantifies, qualifies and catalogs it. He memorizes the facts and figures that describe it. He is passionate about his obsession and he works diligently at learning more in his attempts at revealing the structures and patterns that run through nature. He reads and writes and reads and writes some more. Although he cannot satisfy his curiosity, he has little time to ever get out of doors (except to collect samples).
The other man is very comfortable being outdoors and that is where he can usually be found. He goes on long hikes, he floats down rivers, he lies on his back in fields of clover, basking in sunshine. He sleeps outdoors, walks in rainstorms, builds campfires in snowstorms and stares fascinated at thunderstorms. He might know the name of a certain tree, a flower or a cloud formation, but then again, he might not. He has doubts if he will ever understand the natural world, but he cannot imagine ever being apart from it.