17.至柔而動也剛，至靜而德方。——出自《坤·文言》
今譯:像至柔的大地萌生萬物一樣剛不可禦，又像至靜的大地一樣德行方正而不變易。
衍 言:人類應充分認識並尊重大地母親資生萬物而柔順剛正的品格。
《周易》小詞典：變卦，周易占筮時，有老變少不變原則，即遇所得的卦內有老陽老陰時就是變卦，還要將老陽老陰變成相反的爻成一卦來協助占筮。
What is indicated by Kun is most gentle and weak, but, when put in motion, is hard and strong, it is most still, but is able to give every definite form. ——- from The Record of Wen Yan, Kun
Modern interpretation: Be as strong and impregnable as the gentle and weak Earth which sprouts all things of creation. And be as unchangeable as the still earth which gives every definite form.
Moral: Humanity should fully understand and respect Mother Earth that produces all things in the world and holds a meek disposition.
Glossary: In divination by the eight trigrams, hexagrams may be changed according to the rule of changing the Lao rather than the Shao. Thus, the appearance of lines of Lao Yang and Lao Yin is identified as changing hexagrams. In divination practice, lines of both Lao Yin and Lao Yang would be turned into the opposite.