The Sub-commentary says: 'Humility' means bowing oneself down before others, putting others first and oneself last. Treating others in this manner, everywhere one meets pervasive openness; hence it is said, 'success.'
A petty person practicing humility cannot endure for long; only 'the gentleman has a good end.'
However, examining the imagery of the Humility hexagram, humility is the finest among all virtues, the very peak of goodness, yet the hexagram does not mention yuan, li, zhen, or good fortune. Yuan is the head of things; li and zhen are firmness and uprightness.
In human conduct, since one retreats in humility, how could one act as the head? Using humility to yield to others, how could one direct and correct things? Therefore it does not speak of yuan, li, or zhen.
Humility is certain to attain good fortune, and its good fortune is self-evident, so the text does not state it.
Moreover, in the style of the Yijing, where the principle of good fortune is obvious, it is often not stated; this judgment of Humility and Qian's Nine in the Fifth Place 'beneficial to see the great man' are cases where the auspicious principle is distinct, hence 'good fortune' is omitted.
Where other hexagrams mention 'good fortune,' it is because the situation carries ambiguity, the line combining both good and evil. If actions are good, good fortune follows; if actions are evil, good fortune cannot be attained.
In instances where 'good fortune' is specified, it is named because there is doubt if left unmentioned.
Like Kun's Six in the Fifth Place and Tai's Six in the Fifth Place, both dwelling in the honored position with a yin line: if they do not perform their task, there is no good fortune; if they perform it, they attain good fortune, hence both say 'supreme good fortune.'
Other mentions of good fortune are modeled on this. There are also cases where something brings good fortune to a great man but misfortune to a petty person, such as Pi's Nine in the Fifth Place: 'Stagnation rests; good fortune for the great man.'
Or where it brings good fortune to a petty person but misfortune to a great man, as in Zhun's Nine in the Fifth Place: 'Perseverance in small matters brings good fortune; perseverance in great matters brings misfortune,' and Pi's Six in the Third Place: 'Embracing shame; good fortune for the petty person.'
There are also cases where good fortune is manifest and yet stated as 'good fortune,' such as Da You's Nine at the Top: 'Heaven blesses him; good fortune, nothing that is not advantageous.' But the structure of the Yi cannot be reduced to a single rule.
Now each is explained according to its text, and the meanings are fully set forth under the respective hexagrams. Now, in the judgment of the Humility hexagram, its good fortune is obvious.
Since it does not say 'good fortune,' why do the initial six, six in the second place, and nine in the third place all say 'good fortune'? The Humility hexagram governs all six lines in general; its goodness being so vast, there is no need to state 'good fortune.'
Each of the six lines illuminates its specific meaning, and their significance varies in quality; since their individual virtues do not preclude the possibility of being unfavorable, 'good fortune' must be stated to make it clear.