頤 → 蹇
第27卦 頤 (Nourishment) 变 第39卦 蹇 (Obstruction)
变爻
此变化涉及 4 个变爻（第 1、3、5、6 爻）。
第初爻
初九 舍爾靈龜。觀我朶頤。凶。
Nine at the beginning means: You let your magic tortoise go, And look at me with the corners of your mouth drooping. Misfortune.
第三爻
六三 拂頤。貞凶。十年勿用。无攸利。
Six in the third place means: Turning away from nourishment. Perseverance brings misfortune. Do not act thus for ten years. Nothing serves to further.
第五爻
六五 拂經。居貞吉。不可涉大川。
Six in the fifth place means: Turning away from the path. To remain persevering brings good fortune. One should not cross the great water.
第上爻
上九 由頤。厲吉。利涉大川。
Nine at the top means: The source of nourishment. Awareness of danger brings good fortune. It furthers one to cross the great water.
卦象变化
焦氏易林
殺行桃園，見虎東西。螳螂之敵，使我無患。
Marching through the peach orchard; tigers appear east and west. The mantis stands as adversary; it keeps me from harm.
— 焦延寿《焦氏易林》，公元前一世纪
注释
山下有雷化為山上有水之蹇，頤養之途遇蹇之阻滯。殺行桃園，見虎東西——殺機瀰漫之桃園中，猛虎往來巡視。螳螂之敵，使我無患——螳螂挺臂擋車，以微小之軀引開虎之注意，反使人安。螳臂當車本喻不自量力，此處卻反用為意外之護佑。從頤至蹇，養之路途受阻：山上積水，寸步難行。然蹇之「反身修德」正在此：至險之中以最不可能之力量化危為安。微小之勇有時即為存活之關鍵。
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