聽其言觀其行
聽

聽其言觀其行　　　 tīng qí yán guān qí xíng

[listen to what a person says and watch what he does;take note of sb.'s words but judge him by his deeds] 聽一個人說什么，又看他做什么，常有不僅要聽他說的，更重要的是看其做的如何的含義