the Dao of Earth was, which they defined in terms of hard and soft… when Earth is involved, we refer to things in terms of soft and hard.
This passage establishes ‘soft’ as one half of the fundamental cosmological dyad governing Earth and physical form in the I Ching tradition, making it a structural metaphysical principle rather than a mere quality.
, The Classic of Changes: A New Translation of the I Ching as Interpreted by Wang Bi, 1994thesis