I Ching hexagram
21. Biting Through
噬嗑Shì Kè
Fire over Thunder
Also called Discernment, Gnawing, The Symbol of Mastication and Punishment by Pressing and Squeezing, Gnawing Bite, Severing, Chewing, Punishment, Reformation, Reform, Differentiation, Discrimination, Making a Distinction, Getting the message "Something which should be, or has to be bitten through. This is essentially the legal hexagram. When asking about a man's intentions, he is probably married." -- D.F. Hook

Hexagram 21, Biting Through (噬嗑 Shì Kè) is formed by Fire over Thunder. It is also known as Discernment, Gnawing, The Symbol of Mastication and Punishment by Pressing and Squeezing, Gnawing Bite, Severing, Chewing, Punishment, Reformation.
Legge
Read as
The judgment
Legge
亨。利用獄。
Success is found in Discernment. The restrictions of the law bring advantage.
The six lines
line 1 is at the bottom
- Line 1Yang
屨校滅趾,无咎。
Since this is only your initial step off the right path, the consequences will be mild. This should encourage early correction.
- Line 2Yin
噬膚滅鼻,无咎。
Consequences come quickly and thoroughly for those who persist in wrongdoing. Even if they seem harsh, they will effectively prompt change. Ultimately, this is a necessary process.
- Line 3Yin
噬腊肉,遇毒。小吝,无咎。
You currently lack the authority needed to initiate change. Your efforts may be met with indifference, leaving you feeling embarrassed. Nevertheless, change is essential, and your attempts are valid.
- Line 4Yang
噬乾胏,得金矢,利艱貞,吉。
The challenge before you is indeed formidable. You must confront a powerful force. Stay determined and steadfast once you begin; successful outcomes require vigilance and continuous effort.
- Line 5Yin
噬乾肉,得黃金,貞厲,无咎。
Despite limited options, making a decision is tough. Once you commit to a path, stand firm in your choice. Stay alert to potential risks, and you'll be able to navigate them.
- Line 6Yang
何校滅耳,凶。
A person who fails to acknowledge their own flaws will stray further from the right path. Someone off the path cannot grasp the warnings offered by others. As the saying goes: 'There will be trouble.'
When this hexagram changes
These are the moves that have come up most often in readings. Each page keeps the book text.
Use this hexagram in a reading
These are the same judgment and lines that appear when hexagram 21 comes up in a cast. Ask a question to see which lines change, or keep a journal of your readings. The throw uses the odds of three coins: how a reading is cast.