咸卦九四
泽山咸 · 周易第 31 卦
九四：贞吉悔亡，憧憧往来，朋从尔思。
小象传
象曰：贞吉悔亡，未感害也。憧憧往来，未光大也。
爻位
九四是阳爻居四位，阳居阴位为不当位；与初爻相应，一阴一阳为有应。
京房纳甲：丁亥（水），六亲为子孙。
此爻变
此爻独动，泽山咸变为水山蹇（第 39 卦）。对应的易林诗：焦氏易林·咸之蹇。
理雅各英译（1882）
The fourth NINE, undivided, shows that firm correctness which will lead to good fortune, and prevent all occasion for repentance. If its subject be unsettled in his movements, (only) his friends will follow his purpose.
'Firm correctness will lead to good fortune, and prevent all occasion for repentance:' - there has not yet been any harm from (a selfish wish to) influence. 'He is unsettled in his movements:'(his power to influence) is not yet either brilliant or great.
本卦
泽山咸（第 31 卦），卦辞：咸：亨，利贞，取女吉。
经文依通行本，已与 Chinese Text Project（ctext.org）逐段比对。卦象是研读与自我反思的材料，不作吉凶断语，也不替代医疗、法律、财务等专业意见。