Gao Zi I · Passage 09 / 20 · 孟子 6A.9
Mencius 6A.9: one day in the sun, ten days in the cold
Mencius uses the image of one day of warmth and ten of cold to argue that moral growth depends on sustained conditions, not occasional inspiration.
孟子曰:「無或乎王之不智也。雖有天下易生之物也,一日暴之,十日寒之,未有能生者也。吾見亦罕矣,吾退而寒之者至矣,吾如有萌焉何哉!今夫弈之為數,小數也;不專心致志,則不得也。弈秋,通國之善弈者也。使弈秋誨二人弈:其一人專心致志,惟弈秋之為聽;一人雖聽之,一心以為有鴻鵠將至,思援弓繳而射之。雖與之俱學,弗若之矣。為是其智弗若與?曰:非然也。」
Mencius said, 'It is not to be wondered at that the king is not wise! Suppose the case of the most easily growing thing in the world; if you let it have one day's genial heat, and then expose it for ten days to cold, it will not be able to grow. It is but seldom that I have an audience of the king, and when I retire, there come all those who act upon him like the cold. Though I succeed in bringing out some buds of goodness, of what avail is it? Now chess-playing is but a small art, but without his whole mind being given, and his will bent, to it, a man cannot succeed at it. Chess Qiu is the best chess-player in all the kingdom. Suppose that he is teaching two men to play. The one gives to the subject his whole mind and bends to it all his will, doing nothing but listening to Chess Qiu. The other, although he seems to be listening to him, has his whole mind running on a swan which he thinks is approaching, and wishes to bend his bow, adjust the string to the arrow, and shoot it. Although he is learning along with the other, he does not come up to him. Why? Because his intelligence is not equal? Not so.'
Priority note
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Central question
Why does Mencius use 'one day of exposure, ten days of cold' to talk about the heart and education?
Direct answer
Because the heart, like a growing thing, is threatened less by the absence of one good day than by the dominance of hostile conditions. Brief awakening cannot hold if everything afterwards keeps freezing the growth back down.
First principle
Formation depends on sustained environment, not single moments of motivation. A good beginning repeatedly placed in contrary conditions will be reshaped against itself.
Why it matters
This passage serves searches around habit, cultivation, and why Mencius cares so much about environment. It helps explain the mechanics of moral growth rather than merely praising it.
Further reading
What this passage is doing
This is passage 9 of 20 in Gao Zi I. The cleanest entry point is "It is not to be wondered at that…". In context, it works as part of Mencius's argument about human goodness, desire, and the debates with Gaozi and can be read alongside Humane government / kingly way.
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Gao Zi I is the central battleground for human goodness and the arguments with Gaozi.
Related principles
Citation note
Do not read it as a generic willpower slogan. Mencius is emphasizing the structural force of repeated conditions, not just the need to try harder.