Li Lou II · Passage 08 / 33 · 孟子 4B.8

Mencius 4B.8: only by refusing some things can one truly act

Mencius compresses a major moral insight into one line: effective action does not begin with doing everything, but with first deciding what must not be done.

孟子曰：「人有不為也，而後可以有為。」

mèng zǐ yuē：「rén yǒu bù wéi yě， ér hòu kě yǐ yǒu wéi。」

Mencius said, 'Men must be decided on what they will NOT do, and then they are able to act with vigour in what they ought to do.'

Priority note

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Central question

Why does Mencius say that a person must have things they will not do before they can really act?

Direct answer

Because action without boundaries has no durable direction. Only when some lines are firmly refused can judgment, effort, and character gather around worthwhile action.

First principle

The power of choice comes not only from what one can do, but from knowing what one should never do.

Why it matters

This brief line connects naturally to modern search intent around focus, boundaries, and principled action.

What this passage is doing

This is passage 8 of 33 in Li Lou II. The cleanest entry point is "Men must be decided on what they will…". In context, it works as part of Mencius's argument about seeing people clearly, ritual restraint, and governing relationships and can be read alongside Human nature.

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