人心难测

Explanation: Difficult to detect that the human heart. 　　Source: "Records of the Historian Huaiyin Hou Biography" before Changshan Wang, Shing king commoner, the phase at the turn of the neck to cut the throat ... ... This two phase, and the world to the joy too. However, relative to birds by death, why? For patients born in more, but people are unpredictable. " 　　Examples: Tell me what you make to the business some kind of channel, and is that? True one is ~, the amount of water is difficult. But it was Jia Lian visit. ★ Mingling 濛 beginning "of half an hour Pai An Jing Qi" Volume Twenty