A Discussion of the Names of Two Yijing Hexagrams

Why is Xiaochu 'xiao,' and Dachu, 'da?' While a number of significant differences between Xiaochu (??, hexagram 9) and Dachu (??, hexagram 26) may be highlighted, as well as some striking commonalities, ultimately it seems that the most persuasive, single trait that distinguishes the two hexagrams is the different number of yin lines in each upper trigram. Nonetheless, an exploratory survey of some of the hexagrams' other qualities is not without merit, and may contribute to understanding the relationship of the two.

One of the most outstanding similarities is the theme of refinement of one's character found in the images of both hexagrams. Xiaochu says:

The wind drives across heaven:

The image of THE TAMING POWER OF THE SMALL.
Thus the superior man
Refines the outward aspect of his nature. (Wilhelm & Baynes p. 432)
And Dachu:
Heaven within the mountain:
The image of THE TAMING POWER OF THE GREAT.
Thus the superior man acquaints himself with many sayings of antiquity
And many deeds of the past,
In order to strengthen his character thereby. (Wilhelm & Baynes p. 516)