Chuang Tzu and Heidegger both emphasise the virtue of 'spontaneity' - a sort of mindful responsiveness to things as they are. It's this notion, I suspect, that is the best bet for helping to make some sense of talk about harmony or unity with nature.
After I broke my leg I had to go back and do one of the remakes of 'The Magnificent Seven' and ended up on a horse that pitched me off and broke my leg again. . . I rode horses pretty well. I just didn't like doing it.