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.
A teacher is someone who has taken their mind much further than you have. They've gone into the void further. They've seen the luminous realities. No one has seen them all. . . but they've seen more than you have and they understand the trap of self-reflection.