Upper Trigram:Tui, Joy, a Lake
Lower Trigram:Li, Clinging Brightness, Fire
Governing Ruler:Nine in the fifth place

The Image
Fire in the midst of a lake: the image of Ko. The superior man, in accordance with this, regulates his astronomical calculations, and makes clear the seasons and times.

Miscellaneous Signs
Ting takes what's new; the old is left by Ko.

The Judgement
What takes place as indicated by Ko, is believed in only after it has been accomplished. There will be great progress and success. Advantage will come from being firm and correct. In that case occasion for repentance will disappear.

In Ko we see water and fire extinguishing each other; we see also two daughters dwelling together, but with their minds directed to different objects: on account of these things, it is called the hexagram of revolution.
'It is believed in only after it has been accomplished': when the revolution has taken place, faith is accorded to it. We have cultivated intelligence as the basis of joyful satisfaction, suggesting 'great progress and success' coming from what is correct. When change thus takes place in the proper way, 'occasion for repentance disappears'. Heaven and earth undergo their changes, and the four seasons complete their functions. Thang changed the appointment of the line of Hsia to the throne, and Wu that of the line of Shang, in accordance with the will of heaven and in response to the wishes of men. Great indeed is what takes place in a time of Revolution.

The Lines and commentaries
Bottom Nine
Showing one as if bound by the hide of a yellow ox.
'He is bound by the hide of a yellow ox': he should not, in his circumstances, be taking action.
Six in the second place
Showing its subject making his changes after some time has passed. Action taken will be fortunate. There will be no error.
'He makes his changes after some time has passed': what he does will be matter of admiration.
Nine in the third place
Showing that action taken by its subject will be evil. Though he be firm and correct, his position is perilous. If the revolution he contemplates be three times fully discussed, he will be believed in.
'The revolution (contemplated) has been three times fully discussed': to what else should attention now be directed?
Nine in the fourth place
Showing occasion for repentance disappearing from its subject. Let him be believed in; and though he change existing ordinances, there will be good fortune.
The 'good fortune consequent on changing existing ordinances', is due to the faith reposed in his aims.
Nine in the fifth place
Showing the great man producing his changes as a tiger does his stripes. Before he divines and proceeds to action, faith has been reposed in him.
'The great man produces his changes as the tiger does his stripes': their beauty becomes more brilliant.
Top-most six
Showing the superior man producing his changes as a leopard does his spots, while small men change their faces and show their obedience. To go forward now would lead to evil, but there will be good fortune in abiding firm and correct.
'The superior man produces his changes as a leopard does his spots': their beauty becomes more elegant.
'Small men change their faces': they show themselves prepared to follow their ruler.

1. Ch'ien
Creative Principle

2. K'un
Passive Principle

3. Chun
Initial Difficulties

4. Meng
Youthful Inexperience

5. Hsü

6. Sung

7. Shih
The Army

8. Pi
Seeking Unity

9. Hsiao Ch'u
Minor Restraint

10. Lü
Treading carefully

11. T'ai

12. P'i

13. T'ung Jen

14. Ta Yu
Great Possessions

15. Ch'ien

16. Yü

17. Sui

18. Ku
Arresting Decay

19. Lin

20. Kuan

21. Shih Ho
Biting through

22. Pi

23. Po

24. Fu
The Turning Point

25. Wu Wang

26. Ta Ch'u
Restraining Force

27. I

28. Ta Kuo

29. K'an
The Abyss

30. Li
Clinging Brightness

31. Hsieh

32. Heng

33. Tun

34. Ta Chuang
Strength of Greatness

35. Chin

36. Ming I
Sinking Light

37. Chia Jen
The Family

38. K'uei

39. Chien

40. Hsieh

41. Sun

42. I

43. Kuai

44. Kou
Coming on

45. Ts'ui

46. Sheng
Moving upward

47. K'un

48. Ching
The Well

49. Ko

50. Ting
The Cauldron

51. Chen

52. Ken

53. Chien
Gradual Progress

54. Kuei Mei
Marriageable Maiden

55. Feng

56. Lü
The Wanderer

57. Sun
Gentle Penetration

58. Tui

59. Huan

60. Chien

61. Cung Fu
Inner Truth

62. Hsiao Kuo
Small Excess

63. Chi Chi
Completion and After

64. Wei Chi
Before Completion