From all sides we absorb many kinds of things, they all enter our inner space. Be careful what you allow to enter your mind. Watch the food you eat (yes, it enters your mind too!), the information you accept, the thoughts you think, the facts you see, the fantasies you imagine.
They all together fill your soul, they shape your intuition, and they decide what you emanate.
If you eat inferior food, entertain ugly thoughts, believe distorted information, then you will never be able to live a valuable life. It will have no value for you and not for those around you. On the other hand, if you keep a sharp eye on all your food, you will develop an infallible intuition, a reliable guide for everything you do.
YÍ: The character represents a jaw or chin (1) and a person's head (2). Chin, cheeks, nourish, rear, take care of oneself.
The trigrams: Thunder below Mountain:
Thunder is life-force, germination, new beginnings. Mountain is everything solid, so in yourself it is most of all your body. In order to use the life-giving power of Thunder you need healthy food. Mountain is also your individuality, which is the most "solid" part of your mind. You can even give it a name: me, ego. Give it the right food, make it live, make it healthy.