Classica Sinica Medica

天子

tiān zǐ

The son of heaven · tian zi

Also rendered: the son of heaven (Keeps the ordinary title and lets the redefinition land) · the child of heaven (Avoids the imperial reading entirely; too mild)

Cosmology

Reviewed · 2026-09

At a glance

Pinyin
tiān zǐ
Simplified
天子
Literal
天 is heaven and 子 is a child — and the title 天子 is the ordinary word for the emperor. Chapter 25 takes it and redefines it without ceremony: 知萬物者，謂之天子 — the one who knows the myriad things is called the son of heaven. Two clauses earlier the text has said that whoever can answer to the four seasons has heaven and earth as father and mother, so the title follows from the parentage: if heaven and earth are your parents then heaven is your father and you are its child. The definition is epistemic, not political, and the chapter puts it next to 黔首, the black-haired people who know nothing, a few lines later.
Shuowen
《說文解字》：天，顛也。至高無上，从一大；子，十一月陽气動，萬物滋，人以為偁。象形。天子本謂王者，本篇別為一義。本篇之目：知萬物者，謂之天子。

In brief

Chapter 25’s redefinition of the imperial title as an epistemic one: not the man who rules the myriad things but the man who knows them. The definition is sandwiched between two other claims about knowing — that heaven and earth become father and mother to whoever answers the four seasons, and that the black-haired people share their food and know none of it. Read together, the three clauses describe a hierarchy of knowledge rather than of rank, which is unusual and worth noticing.

Senses in the classical corpus

1
The parentage that precedes it 天地爲之父母
能應四時者，天地為之父母
人能應四時者，天地爲之父母 — Suwen 25
2
The redefinition 謂之天子
知萬物者謂之天子，非爵位之謂
知萬物者，謂之天子 — Suwen 25
3
Set against the black-haired people 黔首共餘食
同篇一貴一賤，皆以知與不知分
黔首共餘食，莫知之也 — Suwen 25
4
Knowing, not ruling 知萬物者
所重在一「知」字
知萬物者 — Suwen 25
5
The claim that follows 聖智不能欺也
知十二節之理者，聖智亦不能欺
知十二節之理者，聖智不能欺也 — Suwen 25
6
The same knowing, at the end 神無營於衆物
知之至者，神不為物引
神無營於衆物 — Suwen 25

Occurrences in the classics

Passages where the term does real work, with the original, pinyin and English on the same line.

Display
1 passages
素問·寶命全形論 Suwen 25 · 寶命全形論 Read in context →
人能應四時者，天地爲之父母。知萬物者，謂之天子。 人能应四时者，天地为之父母。知万物者，谓之天子。
Rén néng yìng sì shí zhě, tiān dì wèi zhī fù mǔ. Zhī wàn wù zhě, wèi zhī tiān zǐ.
One who can answer to the four seasons has heaven and earth as father and mother. One who knows the myriad things is called the son of heaven.
「人能應四時者，天地爲之父母。知萬物者，謂之天子。」天子本王者之稱，本篇別為一義——不是治萬物者，是知萬物者。上一句已說「天地爲之父母」，則「天子」之名即由父母而來：既以天地為父母，則為天之子。**「應」讀 yìng**，順應之義，非應答之 yīng。「萬」讀 wàn。三句相連，其分不在爵位而在知與不知：知者為天子，不知者為黔首——下文「黔首共餘食，莫知之也」（§16）正與此對。「黔」讀 qián；「餘」讀 yú。本篇貴賤之辨，一以「知」字為斷，這在《內經》中是不多見的。

Compounds built on this term

天子
tiān zǐ
the son of heaven
本篇以「知萬物者」當之
黔首
qián shǒu
the black-haired people
同篇與天子相對，「黔」讀 qián
父母
fù mǔ
father and mother
「天地爲之父母」，本篇天人相配之語
聖智
shèng zhì
sagely wisdom
「聖」讀 shèng，「智」讀 zhì

How it has been translated

Every rendering below is a decision about which reader is being addressed. There is no neutral option.

Wiseman & Fengthe son of heavenThey keep the conventional title, as translators generally do, and let the defining clause do the work.
Unschuldthe son of heavenSame choice; the passage is unusual enough that no established alternative has formed around it.
This sitethe son of heavenWe keep the title for the same reason the chapter does: the force of the sentence comes from taking a political word and making it mean knowledge. Translating around it would remove the surprise.

Entry status

Review pending — who reviews this?

2026-09

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Reading path

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