Zhuangzi (莊子, 庄子, Zhuāng Zǐ, Chuang Tzŭ, Chuang Tsu, Zhuang Tze, or Chuang Tse) was a skeptical and mystical Chinese philosopher who lived around the 4th century BCE during the Warring States period. The Taoist text Zhuangzi is speculated to be partly authored by him and is the source of many anecdotes and idioms. He argued that life and knowledge are limited, and denied the need for government. His points on the limitations of language and the importance of being spontaneous were strongly influential in the development of Chinese Buddhism, especially Chan (Zen).