I Ching, Yijing or Zhou Yi
"Oracle of the moon": © 2000 LiSe
What does it mean, 'inner' and 'outer' trigram (popup)
Kăn below Zhèn: Kăn often indicates intuitïon and the freeing of tensions because it has no shape of its own, and when it has Zhèn on the outside to manifest that, you get the skills of an acrobat. A freedom of thinking and moving that is not restrained by rules or ideas.
Ideogram of the character Jiě: at the top two hands taking a horn, at the bottom the head of an ox. Release, solution, opening bound and tied things, remove, abolish, stop, melt, clarify, analyze and explain, understand, reconciliation, negligent, relaxed, slack, encounter, to alleviate (pain etc); to cut apart, dissect, dissolve, discharge (water etc), defecate, to forward, send, hand over to. In the past, it referred to various skills of acrobatic performances, especially those performed on horses.
The ideogram might be grasping the horns to somersault over the animal.
The Image says: Thunder and rain at work: release. The noble one pardons transgressions and is lenient towards crimes.
Hex.40 is the contrast of 37, which is about being and acting according to your abilities and to the place in life where you belong.
Hex.40 is when nothing is predefined, it is the moment and the intuïtion which decide the action. Hex.40 is the hexagram of the archer who releases the arrow at the right moment and exactly on its target. Not by aiming consciously but because nothing else exists for him right then.