... the words "one with heaven and earth" a symbolic form of an experience ... What does it mean other than the person experiencing it can blend and avoid while throwing another person?
Why do you think harmony of heaven and earth is about "blending and avoiding while throwing"?
This seems to be evident to you? To me it is not.
Why don't you think it is about uniting the lower and the upper danitian using "internal alchemy"?
Why don't you think it is about "hanging from heaven" and "rooting in earth"?
Why don't you think it is about connecting with he ki of heaven and the ki of earth?
Why don't you think it is about just opening and closing the spine?
To me these aspects and related phenomenons seem much more evident when thinking about harmony of heaven and earth.