쾌(夬) — 연못 위에 하늘. 연못 물이 제방을 터뜨리고 쏟아져 나온다. 결단할 때는 결단하라. 과감히 결정하고 공개적으로 처리하라.
효별 해설
초효：壮于前趾，往不胜为咎。 Strong toes leading ahead — going exceeds capability; calamity. Rushing ahead with weak foundation invites failure.
이효：惕号，莫夜有戎，勿恤。 Alert and calling out — night attacks bring no worry. Vigilance averts trouble.
삼효：壮于頄，有凶。君子夬夬，独行遇雨，若濡有愠，无咎。 Strong cheekbones — danger. The noble decides firmly, walking alone in rain, soaked and resentful but no harm. Decisive action brings discomfort but no lasting damage.
사효：臀无肤，其行次且。牵羊悔亡，闻言不信。 Buttocks without flesh — walking is hard. Led astray; believing bad advice brings regret. Poor judgment leads to passivity.
오효：臀无肤，其行次且。牵羊悔亡，闻言不信。 Purslane on dry land — the middle way; no harm. Simple, direct, and balanced.
상효：无号，终有凶。 No one answers the call — ultimate danger. In crisis, isolated without help.