Hexagram 28: 大過
dà guò — greatness in excess
Judgment
Preponderance of the Great. The ridgepole sags to breaking point. It furthers one to have somewhere to go. Success. The bridge needed to support transitional traffic, not permanent load. Extraordinary measures for extraordinary times—but you must keep moving. Stasis means collapse.
Image
Lake rises above trees: extraordinary times. The superior man stands alone unconcerned, renounces the world undaunted. When the bridge was twisting itself apart, the camera kept rolling. The dog's owner tried to rescue it, got bitten, retreated. Sometimes you document the catastrophe and accept the loss.
Digital Artifact
The Tacoma Narrows Bridge Collapse
Reality (physics) vs. Leon Moisseiff (engineer) (1940)
Galloping Gertie—the nickname for the Tacoma Narrows Bridge before it tore itself apart four months after opening. Leon Moisseiff designed it as the most elegant suspension bridge ever built: slender, graceful, efficient. Too efficient. Too much strength in the middle (the 2,800-foot main span), too little at the edges (shallow support trusses). Wind created oscillation, oscillation created resonance, resonance created catastrophic failure. The bridge twisted, buckled, collapsed into Puget Sound. Captured on film: the only human casualty was a dog trapped in a car, and the physics is so clear you can watch exactly how excessive strength in the center leads to destruction when the ends can't support it. The image is perfect: beam strong in the middle, weak at the ends, must be crossed quickly or collapse is inevitable.
Historical Context
- Period
- Zhou Dynasty
- Oracle Bone Etymology
- Lake (☱) above, Wind (☴) below—joyousness over gentle penetration.
- Traditional Use
- The classical text describes preponderance of the great: four strong lines inside, two weak lines outside. The ridgepole sags to breaking point.
Lines
Line 1: 藉用白茅無咎
Line 2: 枯楊生稊老夫得其女妻無不利
Line 3: 棟橈凶
Line 4: 棟隆吉有它吝
Line 5: 枯楊生華老婦得其士夫無咎無譽
Line 6: 過涉滅頂凶無咎
Practical Guidance
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