知之弗豫 zhī zhī fú yù

zhī zhī fú yù phrase to know that he is not suitable
Domain: Literary Chinese 文言文
Notes: Quote: from Commentaries on the Four Books by Zhu Xi 朱熹四書章句集注 《憲問第十四》 Commentary on Xian Wen XIV (Mathews 1931 '潛藏隱伏', p. 128)