Zhuangzi (莊子) 369 -- 286 BC

"Everyone in the world knows how to seek for knowledge 

that they do not know, 

but do not know how to find what they already know."

Zhuang Zhou commonly known as Zhuangzi Chinese: 莊子; literally "Master Zhuang"; was an influential Chinese philosopher who lived around the 4th century BCE during the Warring States period, a period of great development in Chinese philosophy, the Hundred Schools of Thought. He is credited with writing—in part or in whole—a work known by his name, the Zhuangzi, which is one of two foundational texts of Taoism, alongside the Tao Te Ching.

Zhuangzi Dreaming of a Butterfly, by 18th-century Japanese painter Ike no Taiga