Those who fully develop their mind know their nature. Knowing their nature, they know Heaven.
盡其心者、知其性也。知其性、則知天矣

Philosophers
Mencius
Born c. 372 BC in China's Warring States era, Mencius held that human nature is inherently good. He championed benevolent rule rooted in the people's welfare. His writings became one of Confucianism's Four Books.
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Mencius's Other Quotes
The feeling of compassion is the sprout of benevolence; shame, of righteousness; deference, of propriety; right and wrong, of wisdom.
The people are most important; the altars of state come next; the ruler is least important.
Favorable timing is less important than geographical advantage, and that is less important than unity among people.
The trouble with people is that they love playing teacher to others.
We survive through adversity and perish through comfort.
Related Quotes
Knowing others is intelligence; knowing yourself is true wisdom. Mastering others is strength; mastering yourself is true power.
-- Laozi
It is in the knowledge of the true conditions of our life that we must draw our strength to live and our reasons to act.
-- Simone de Beauvoir
Each of us carries a heaven-sent mission; living joyfully in pursuit of that calling is the first requirement of a well-lived life.
-- Shibusawa Eiichi
Risk comes from not knowing what you're doing.
-- Warren Buffett
I'm only rich because I know when I'm wrong.
-- George Soros
All the successful entrepreneurs I've met have one thing in common: they all want to talk about their mistakes.
-- Stephen A. Schwarzman