From 'The Tuan Commentary says' down to 'their wills do not agree is called Revolution.' The Correct Meaning states: This explains the hexagram's name based on the two component trigrams. Water and Fire extinguishing each other first clarifies Revolution from the two images.
'Xi' means generating. Fire is originally dry; the lake is originally moist. Dryness and moisture have distinct natures and cannot dwell together. If they dwell together, they must assault and overcome each other.
Once they assault and overcome each other, change is generated, and when change is generated, their original natures alter: water heats up into broth, and fire is extinguished into cold ash. This is what is meant by 'Revolution.'
As for 'two women living together,' this clarifies Revolution through human affairs. The middle and younger daughters form one hexagram; though their forms are alike, their wills are transformed.
Only one man and one woman can resonate and respond; though two women live together, their wills never agree. When wills do not agree, change must arise; this is why it is 'Revolution.' From 'On one's own day there is belief' down to 'its regret vanishes.'
The Correct Meaning states: 'On one's own day there is belief: reforming and being trusted' explains the meaning of Revolution, that at the beginning of reform there is no trust, but on one's own day belief arises.
'Civilized and joyful' cites the two trigrams above to explain 'reforming and being trusted,' and below to explain the four virtues. Being able to cultivate civilized virtue to bring joy to people is how revolution becomes trusted by the people.
As for 'great success through correctness,' since the people rejoice in civilized virtue and follow it, there is great breakthrough and benefit in correctness.
'Reforming appropriately, its regret vanishes' means that if revolution accords with great breakthrough and beneficial correctness, it can be called appropriate. When reform conforms to principle, its regret vanishes.
From 'Heaven and Earth revolutionize and the four seasons are completed' down to 'great indeed!' The Correct Meaning states: 'Heaven and Earth revolutionize and the four seasons are completed' broadens the meaning of Revolution below.
Here it first clarifies 'Heaven and Earth revolutionize': the way of Heaven and Earth is that yin and yang rise and fall, warmth, heat, coolness, and cold alternately transform, and only then are the orders of the four seasons completed.
'Tang and Wu revolutionized the mandate, obedient to Heaven and in accord with humanity' clarifies human revolution. King Jie of Xia and King Zhou of Yin were tyrannical and unbounded; Heaven was enraged and the people rebelled.
King Tang of Shang and King Wu of Zhou were clear-sighted and sagely wise; above they conformed to Heaven's mandate, and below they answered human hearts.
Banishing Jie at Mingtiao and slaying Zhou at Muye, they transformed their royal mandate and altered their evil customs; hence it is said: 'Tang and Wu revolutionized the mandate, obedient to Heaven and in accord with humanity.'
In accounting for kings succeeding one another, changing the calendar and altering the vestments are all revolutions; yet Tang and Wu alone are cited because the abdication of Shun and Yu still involved continuity, whereas the arms of Tang and Wu pushed change to its utmost limits.
Thus the most radical of transformations are taken to illustrate human revolution. 'The time of Revolution is great indeed!' having fully discussed the breadth of the way of revolution, sums up by praising its greatness, hence saying 'great indeed!'
The Correct Meaning states: 'Fire within the lake: Revolution' means that fire being inside the lake, the two natures conflict and must change each other; hence it forms the image of Revolution.
'The noble person, in accordance with this, regulates the calendar and clarifies the seasons' means that heavenly seasons alter, requiring calendar calculation; thus the noble person observes this image of revolution to refine the calendar and clarify the heavenly seasons.