The sole concern of learning is to seek one's original heart.

Mencius (371 BCE-289 BCE), Mencius was a Chinese Confucian philosopher, often described as the Second Sage (亞聖) to reflect his traditional esteem relative to Confucius himself. He was part of Confucius's fourth generation of disciples, inheriting his ideology and developing it further. Living during the Warring States period, he is said to have spent much of his life travelling around the states offering counsel to different rulers.