乾 → 豫
Hexagram 1: The Creative → Hexagram 16: Enthusiasm
Changing Lines
This transformation involves 5 changing lines (lines 1, 2, 3, 5, 6).
Line 1
初九 潛龍勿用。
Nine at the beginning means: Hidden dragon. Do not act.
Line 2
九二 見龍在田。利見大人。
Nine in the second place means: Dragon appearing in the field. It furthers one to see the great man.
Line 3
九三 君子終日乾乾。夕惕若厲。无咎。
Nine in the third place means: All day long the superior man is creatively active. At nightfall his mind is still beset with cares. Danger. No blame.
Line 5
九五 飛龍在天。利見大人。
Nine in the fifth place means: Flying dragon in the heavens. It furthers one to see the great man.
Line 6
上九 亢龍有悔。
Nine at the top means: Arrogant dragon will have cause to repent.
Trigram Changes
Yilin Verse
禹鑿龍門，通利水源。東注滄海，民得安存。
Yu carved Dragon Gate and opened the water’s source. Flowing east to the vast sea, the people found safe dwelling.
— Jiao Yanshou, Yilin (Forest of Changes), 1st century BCE
Commentary
Yu the Great carved open Dragon Gate, freeing the floodwaters to flow east into the vast sea, and the people at last found peace. From Creative to Enthusiasm, thunder erupts from the earth — the explosive joy that follows liberation. Yu's engineering of the Dragon Gate gorge on the Yellow River is the quintessential act of sagely initiative: not damming the waters but channeling them. The verse captures this as heaven's creative power expressed through deliberate, earth-shaking action. Enthusiasm's ancient kings used this energy for music and worship; Yu transmuted it into hydraulic salvation. The people's survival is the ground that shakes with gratitude.
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