Principle 01
The Single Hair 拔一毛不为
The hair is the test case for a principle of absolute boundaries. A hair is negligible — but a body is only hairs accumulated; concede that one may be taken for "the world", and there is no principled place to stop: today a hair, tomorrow a limb, then the life itself. Yang Zhu's logic, as his disciple Mengsun Yang defends it in the Liezi, is that a boundary must hold at the margin, because every trade establishes the exchangeability of the self. The concrete person must never become currency for an abstraction.
Principle 02
Hold the Self Precious 贵己 · 为我
Yang Zhu anchors all value in the living individual: 「智之所贵,存我为贵」— what wisdom prizes is the preservation of the self. The mechanism is an inversion test: everything you pursue — wealth, rank, legacy — is pursued by a self, and to damage that self in the pursuit inverts the order of means and ends. The Han Feizi records rulers honoring those who 「不以天下大利易其胫一毛」— would not trade one hair of the shin for the profit of the whole world — as 轻物重生之士, those who treat things as light and life as weighty. This is not greed; it is a theory of what is actually yours.
Principle 03
Preserve Nature Whole 全性保真
The Huainanzi preserves Yang Zhu's formula: 「全性保真,不以物累形」— preserve nature whole, keep authenticity, and let no external thing burden the body. "Things" (物) here means everything outside the living self — possessions, offices, honors — and the danger is not having them but being burdened by them. The Liezi chapter diagnoses the mechanism: people trade their nature for things 「以物易性」, exhausting what is inner to decorate what is outer. The discipline is a standing audit: does this acquisition preserve the vessel that owns it, or is the vessel being spent to maintain the acquisition?
Principle 04
A World Without Sacrifice 天下自治
Yang Zhu's politics is the refusal made universal: 「人人不损一毫,人人不利天下,天下治矣」— if no one plucked a single hair and no one set out to "benefit the world", the world would govern itself (Liezi · Yang Zhu). The logic runs against the entire Warring States consensus: disorder comes not from too little sacrifice but from too many people claiming the right to sacrifice others — rulers, generals, saviors. If the right to demand self-immolation is denied at the root, the machinery of extraction has no fuel. Mencius saw this clearly and hated it: 「杨氏为我,是无君也」— Yang's "for oneself" denies the ruler. That was exactly the point.