Throughout the history of I Ching scholarship, two major interpretive approaches have emerged: the Yili School and the Xiangshu School. The Yili (義理) School, often translated as the “Meaning and Principle” or “Moral and Philosophical” School, focuses on uncovering the profound ethical, social, and metaphysical wisdom contained within the I Ching’s hexagrams and texts.

This article will delve into the core tenets and methodologies of the Yili School, examining how its proponents sought to understand the I Ching as a guide to virtuous conduct, self-cultivation, and the underlying principles (Li) that govern human existence and the cosmos, often de-emphasizing the more numerological or overtly divinatory aspects.

The Heart of the Letter

Imagine receiving a long-overdue letter from a grandparent who has passed away. One person might take that letter to a laboratory to analyze the chemical composition of the ink and the mathematical frequency of the vowels used — a technical, structural analysis. But another person sits by the window and reads the letter to understand the sentiment, the advice, and the character of the writer.

The Yili School is the person by the window. To these scholars, the I Ching is not a math problem to be solved; it is a conversation with a sage. They aren’t interested in the “mechanics” of how the lines move as much as they are interested in what the lines are trying to teach us about being a decent human being.

Reorienting Interpretation: Net and Fish

You may think that the “text” of the I Ching is just a decorative description of the symbols. In the Yili School, the text is the authority.

Before the rise of this school, divination was often Xiangshu — focused on images, numbers, and complex astrological correlations. But during the Han and Song dynasties, thinkers like Wang Bi (226–249 CE) pushed back. He famously argued that the “Image” (the trigram) is just a “net” used to catch the “fish” (the meaning). Once you have the fish, you can forget the net. If you focus too much on the math, you lose the wisdom.

Yili Component	Method of Interpretation	Practical Goal
Meaning (Yi)	Contextual and moral analysis	Identify the ethical core of the situation
Principle (Li)	Universal laws of behavior	Find the logic that governs all events of this type
Human Agency	Focus on the “Superior Person”	Use character and choice to improve the outcome
Textual Primacy	Emphasis on the Judgments and Wings	Treat the written word as the primary vehicle for truth

The Methodology of the Heart

The Yili School uses a “top-down” approach. Instead of getting lost in the technicalities of “Void Lines” or “Earthly Branches,” they focus on the Gua Ci (Hexagram Statement) and the Yao Ci (Line Statements).

A classic Yili move, pioneered by Cheng Yi in the Song Dynasty, was to treat every hexagram as a “Stage of Cultivation.” In Hexagram 4 (Youthful Folly), the Yili focus isn’t on when the folly will end (a predictive question), but on how a teacher should properly interact with a student without losing their own dignity (a behavioral question). The goal is spiritual transcendence through the study of conduct.

The Wise Counsel in Real Life

You recognize the Yili School whenever you read a translation of the I Ching that feels like a “Self-Help” book or a “Philosophical Guide.”

The Xiangshu approach might tell you: “You will have money in the month of the Dragon because the Wood element is prospering.”

The Yili approach tells you: “Success comes to those who are modest and persistent. If you are arrogant right now, you will fail regardless of what the calendar says.”

In the Yili lens, the “Auspicious” (Ji) and the “Ominous” (Xiong) are not labels of luck. They are markers of Propriety. To be “auspicious” is simply to be in your “correct place.”

Practical Application: Working with the Text

When you use the Yili method for a reading:

1. Read the Judgment first: This is the moral “summary.” Don’t look at the lines yet. Understand the Principle of the hexagram — “Obstruction” means it’s time for internal work, not external pushing.
2. Journal on the Superior Person: Read the Da Xiang (Great Symbolism). It usually says: “The Superior Person, in accordance with this, [does X].” Ask yourself: How can I embody that specific action today?
3. Follow the text over the noise: If a technical detail (like a hidden hexagram) contradicts the clear moral advice of the text, the Yili School says: Follow the text. The moral principle is more “real” than the technical correlation.

Closing Synthesis

The Yili School saved the I Ching from becoming a dry, mechanical calculator. It turned the book back into a living teacher. By focusing on “Meaning and Principle,” we realize that the Oracle is not trying to tell us our “fortune” — it is trying to help us find our “virtue.” It reminds us that even in a world of constant change, the principles of integrity and balance remain the only stable ground we have.