Learning without thought is labor lost; thought without learning is perilous.
學而不思則罔、思而不學則殆

Philosophers
Confucius
Born c. 551 BCE in Lu, Confucius built a moral system on ren, li, and xiao. The Analects became East Asia's intellectual bedrock, shaping ethics across the civilization sphere for twenty-five centuries.
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Confucius's Other Quotes
Do not impose on others what you yourself do not desire.
When three walk together, one is surely my teacher. I follow what is good and correct what is not.
Knowing it is less than loving it; loving it is less than delighting in it.
The exemplary person demands it of himself; the petty person demands it of others.
I transmit but do not create; I trust in and love the ancients.
Related Quotes
Educate the children and it will not be necessary to punish the men.
-- Pythagoras
To teach superstitions as truth is a most terrible thing.
-- Hypatia
Fables should be taught as fables, myths as myths, and miracles as poetic fancies.
-- Hypatia
In the pursuit of learning, one gains daily. In the pursuit of the Tao, one loses daily -- losing and losing until one arrives at wu wei. Through non-action, nothing is left undone.
-- Laozi
Blue dye is extracted from the indigo plant, yet it is bluer than indigo itself.
-- Xunzi
Learning must never cease.
-- Xunzi