Book 5: 《公冶長》 Gong Ye Chang
《公冶長》 Passage 5.21
子曰：「甯武子邦有道則知，邦無道則愚。其知可及也，其愚不可及也。」
Legge Translation (1861)
The Master said: "When good order prevailed in his country, Ning Wu acted the part of a wise man. When his country was in disorder, he acted the part of a stupid man. Others may equal his wisdom, but they cannot equal his stupidity."