Increase. The Sequence of the Hexagrams states: 'Decreasing without ceasing will surely bring increase; hence it is received with Increase.'
Prosperity and decline, decrease and increase, operate like a cycle; when decrease reaches its limit, increase must follow, as a matter of natural principle. Increase is that which succeeds Decrease.
As a hexagram, Xun is above and Zhen is below; thunder and wind are two things that mutually increase each other. When the wind is fierce, thunder is swift; when thunder crashes, the wind rages; the two mutually assist and increase each other, which is why it is Increase.
This speaks from the image. Both Xun and Zhen are formed by changes from below: a yang changing into a yin is decrease; a yin changing into a yang is increase.
The upper trigram decreases while the lower trigram increases; decreasing the upper to increase the lower is why it is Increase. This speaks from the meaning. When the lower is substantial, the upper is secure; therefore increasing the lower constitutes Increase.
Increase is the way of benefiting all under heaven; hence it is advantageous to have somewhere to go. The way of Increase can cross perils and difficulties; it is advantageous to cross the great stream.
The Commentary on the Judgments states: Increase: Decreasing the upper and increasing the lower, the people's joy knows no bounds. Descending from above to reach below, its way is greatly illuminated. This speaks in terms of the hexagram's meaning and dynamic.
The hexagram is Increase because it decreases the upper to increase the lower. Decreasing the upper to increase the lower, the people's joy knows no bounds, meaning it is inexhaustible.
Descending from above to humble oneself beneath the lower, its way is grand and brilliantly manifest. Yang descending to dwell in the initial position and yin ascending to dwell in the fourth carries the meaning of descending from above to humble oneself below.
'It is advantageous to have somewhere to go; central and correct, there is celebration.' The fifth occupies the honored position with firm yang, centrality, and correctness; the second further responds to it with centrality and correctness.
Thus, through the central and correct Way, it benefits all under heaven, and the world receives its blessings and celebrations. 'It is advantageous to cross the great stream; the way of wood then moves forward.'
As for the way of Increase, in ordinary times of calm, its increase is still small; when facing hardships, perils, and difficulties, its increase is greatest. Therefore it is advantageous to cross the great stream.
Ferrying across difficulties is the time when the way of Increase greatly prevails. [Note: 'Wood' is sometimes taken as an error for 'Increase', while others say upper Xun and lower Zhen signify wood; the latter is incorrect.]
'Increase moves and is gentle; advancing daily without bounds.' Again, speaking of the hexagram's dynamic through the two trigrams: below is movement and above is gentleness; it moves and is gentle.
For the way of Increase, when its movement is gentle and compliant with principle, its increase advances daily, becoming vast without limit. If it moves without complying with principle, how could it accomplish great increase?
'Heaven dispenses and earth generates; its increase knows no limits.' Speaking of the greatness of the way of Increase through the work of heaven and earth, which the Sage embodies to benefit the world: Heaven's way supplies the beginning, and Earth's way brings things to birth.
Heaven dispenses and earth generates, nurturing all things so that each rectifies its nature and destiny; its increase can truly be said to have no boundary.
'Boundary' (fang) means a specific quarter or location; having a specific location implies a limit, whereas having no boundary means vastness without end. How could heaven and earth's increase of all things ever have an end?
'In all, the way of Increase moves together with the time.' The inexhaustibility of heaven and earth's increase is simply principle.
The Sage's way of benefiting all under heaven adapts to the time and complies with principle, harmonizing with heaven and earth, moving together with the time.