噬嗑 · Shì Kè — Decisive Enforcement
King Wen Sequence #21 (噬嗑 Shì Kè — Decisive Enforcement) embodies lightning flash followed by decisive thunderclap. Assigned to the Xun Wind Palace (巽宫八卦 · Subtle Penetration) · 五世卦 (World Line 5 / Response Line 2) and resonant with Summer Solstice Solar Zenith (夏至离火 · 芒种—大暑), its six-line binary vector (100101) pairs 震 Zhen (Awakening Initiative) at the root with 离 Li (Clinging Radiance) at the crown.
《大象》：雷電噬嗑；先王以明罰敕法。 ｜ 《彖传》：頤中有物，曰噬嗑，噬嗑而亨。剛柔分，動而明，雷電合而章。柔得中而上行，雖不當位，利用獄也。
Visual Archetype: forged iron gavel and legal codex. When Fire (Fire) interacts with Thunder (Wood), the primary strategic mandate centers on enforcing clear compliance rules and removing blockers. Its Polarity Opposite (Cuo Gua · 错卦) is #48 井 (The Inexhaustible Wellspring), its Overturned Inverse (Zong Gua · 综卦) is #22 贲 (Aesthetic Adornment), and its Nuclear Core (Hu Gua · 互卦) reveals #39 蹇 (Recalibrating Before Obstacles).
巽宫 · 世爻第5爻 / 应爻第2爻
For decision-makers consulting 噬嗑 (Shì Kè) regarding enforcing clear compliance rules and removing blockers, the hexagram highlights the interplay between Wood foundation and Fire manifestation under the Wood Palace. Rather than generic haste, align execution with Summer Solstice Solar Zenith (夏至离火 · 芒种—大暑) rhythms and inspect whether your natal BaZi chart favors Wood, Fire, or Wood as its Favorable Element (喜用神).
《京氏易传》世应法：六五居尊，應六二大夫(京氏易傳原文:天子居世5爻,應爻隔三爻)
Six Lines Progression (六爻爻辞 · Bottom Line 1 to Top Line 6)
噬嗑 (Shì Kè) Line 1 [初九 · 庚子 (水) · 父母 (水)]: Germination of lightning flash followed by decisive thunderclap near forged iron gavel and legal codex; validate root premises before accelerating enforcing clear compliance rules and removing blockers. Single-line transformation leads to Zhi Gua #35 晋 (Sun Rising Over the Earth).
《周易本义》：校音教○初上无位為受刑之象中四爻為用刑之象初在卦始罪薄過小又在卦下故為屨校滅趾之象止惡於初故得无咎占者小傷而无咎也
噬嗑 (Shì Kè) Line 2 [六二 · 庚寅 (木) · 兄弟 (木) · 应爻 Response]: Central lower-trigram seat anchored in forged iron gavel and legal codex; cultivate Wood craftsmanship in harmony with #39 蹇. Single-line transformation leads to Zhi Gua #38 睽 (Harmonizing Polarities).
《周易本义》：祭有膚鼎蓋肉之柔脆噬而易嗑者六二中正故其所治如噬膚之易然以柔乗剛故雖甚易亦不免於傷滅其鼻占者雖傷而終无咎也
噬嗑 (Shì Kè) Line 3 [六三 · 庚辰 (土) · 妻财 (土)]: Threshold between 震 Zhen and 离 Li during Summer Solstice Solar Zenith (夏至离火 · 芒种—大暑); pace enforcing clear compliance rules and removing blockers carefully. Single-line transformation leads to Zhi Gua #30 离 (Illustrious Radiance).
《周易本义》：腊音昔○腊肉謂獸腊全體骨而為之者堅韌之物也隂柔不中正治人而人不服為噬腊遇毒之象占雖小吝然時當噬嗑於義為无咎也
噬嗑 (Shì Kè) Line 4 [九四 · 己酉 (金) · 官鬼 (金)]: Ministerial counsel within the Xun Wind Palace (巽宫八卦 · Subtle Penetration) · 五世卦; align lightning flash followed by decisive thunderclap with institutional mentors. Single-line transformation leads to Zhi Gua #27 颐 (Nourishing Body & Speech).
《周易本义》：乾音干胏緇美反○胏肉之帶骨者與胾通周禮獄訟入鈞金束矢而後聴之九四以剛居柔得用刑之道故有此象言所噬愈堅而得聴訟之宜也然必利於艱難正固則吉戒占者宜如是也
噬嗑 (Shì Kè) Line 5 [六五 · 己未 (土) · 妻财 (土) · 世爻 World]: Fulcrum of Decisive Enforcement (䷔); command enforcing clear compliance rules and removing blockers through balanced Fire and Wood synthesis. Single-line transformation leads to Zhi Gua #25 无妄 (Unentangled Integrity).
《周易本义》：噬乾肉難於膚而易於腊胏者也黄中色金亦謂鈞金六五柔順而中以居尊位用刑於人人无不服故有此象然必貞厲乃得无咎亦戒占者之辭也
噬嗑 (Shì Kè) Line 6 [上九 · 己巳 (火) · 子孙 (火)]: Culmination of lightning flash followed by decisive thunderclap, pivoting toward Inverse #22 贲 (Aesthetic Adornment) and Opposite #48 井. Single-line transformation leads to Zhi Gua #51 震 (Composure Amid Thunder).
《周易本义》：何何可反○何負也過極之陽在卦之上惡極罪大凶之道也故其象占如此
BaZi & Plum Blossom Numerology (梅花易数) Connection
Spatial & Elemental Calibration for #21 噬嗑: Place a forged iron gavel and legal codex motif or Wood-element accent in your workspace; cross-reference Hexagram #48 (井) when balancing Yin/Yang extremes.
Download Hexagram #21 (噬嗑 Shì Kè) 6 Changing Lines Commentary
Get line-by-line classical Yao Ci (爻辞) interpretations from bottom Line 1 (Initial) to top Line 6 (Culmination).