71.《頤》，貞吉，觀頤，自求口實。——出自《頤·卦辭》
今譯：養生的關鍵是在精神和物質兩方麵都保持正常，所以觀察養生之道，要特別注意控製飲食。
衍言：平時飯吃八分飽，暴飲暴食不必要。
《周易》小詞典：《頤》，卦名。頤有養的意思，它包括培養賢才、養育百姓，也講養生。頤卦介紹了養賢與百姓應該注意的事項。
Yi indicates that with firm correctness there will be good fortune in what is denoted by it. We must look at what we are seeking to nourish, and by the exercise of our thoughts seek for the proper aliment. ——- from Gua Ci, Yi
Modern interpretation: The essence of keeping in good health is a normal state in both material and spiritual life. To conserve our vital powers, we should be especially careful about our diet.
Moral: Immoderate drinking and eating are harmful. It is all right to eat till you are eighty per cent full.
Glossary: As the name of the hexagram, Yi denotes nourishing one’s body or mind, one’s self or others. For this purpose, the hexagram introduced ways of how to cultivate worthy people and what care should be taken in educating common people.