Writing cannot express words completely. Words cannot express thoughts completely. Are we then unable to see the thoughts of the holy sages?
The Master Said:
The holy sages set up the images in order to express their thoughts completely; they advised the hexagrams in order to express the true and false completely. Then they appended judgments and so could express their words completely. (They created change and continuity, to show the advantage completely; they urged on, they set in motion, so set forth the spirit completely.)
– I Ching