Confucius. Book 2, Chapter 10.
Book 2, Wei Chang
1. The Master said, "See what a man does.
2. "Mark his motives.
3. "Examine in what things he rests.
4. "How can a man conceal his character? How can a man conceal his character?"
Text source: Lun Yu, The Confucian Analects. Translated by James Legge.