Book 5: 《公冶長》 Gong Ye Chang
《公冶長》 Passage 5.13
子貢曰：「夫子之文章，可得而聞也；夫子之言性與天道，不可得而聞也。」
Legge Translation (1861)
Zigong said: "The Master's personal displays of his principles and ordinary descriptions of them may be heard. His discourses about man's nature, and the way of Heaven, cannot be heard."