5th-century BCE Chinese philosopher and politician
Confucius (traditionally 28 September 551 B.C. – 479 B.C.) was a Chinese social philosopher, whose teachings deeply influenced East Asian life and thought. "Confucius" is a latinization of the Chinese 孔夫子, Kong Fu Zi or K'ung-fu-tzu, literally "Master Kong", but he is usually referred to in China with a simpler version of this honorific as 孔子, Kongzi, or Kǒng Zǐ.
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The Master said, “Learning without thought is labor lost; thought without learning is perilous.” The Master said, “The study of strange doctrines is injurious indeed!” The Master said, “Yu, shall I teach you what knowledge is? When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it;-this is knowledge.