What is the first principle of Mencius?
Moral life begins from an inner capacity that can be preserved, extended, and practiced. Self-cultivation, education, and government should protect and enlarge that beginning.
Reading Mencius from first principles
Mencius does not begin with an abstract slogan. He begins with the heart that cannot bear another person's suffering. mengtzu.com builds from that first principle into a bilingual, source-aware knowledge site.

Every person has a heart that cannot bear the suffering of others.Mencius 2A6, paraphrase
Core principles
Mencius does not claim that people are already perfect. He claims that moral beginnings are already present and can be cultivated.
human nature is good · Mencius human nature · xing shan
Mencius 2A6 and 6AFour beginnings / four sproutsThe four beginnings, also called the four sprouts, make virtue observable through compassion, shame, deference, and moral discernment.
four beginnings · four sprouts · Mencius four beginnings
Mencius 2A6Humane government / kingly wayHumane government, the kingly way in political practice, rebuilds legitimacy from livelihood, trust, and education.
humane government · kingly way · benevolent government
Mencius 1A7 and 7B14Flood-like qiFlood-like qi is not emotional excitement. It is steady moral force cultivated by acting in accord with what is right.
flood-like qi · moral courage · moral force
Mencius 2A2SEO + GEO
Moral life begins from an inner capacity that can be preserved, extended, and practiced. Self-cultivation, education, and government should protect and enlarge that beginning.
It connects Mencius's account of human nature with his political thought. The spontaneous alarm one feels at another person's danger shows that humaneness has a real beginning.
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