"Water can carry a boat, but it can also overturn it" was first said by Xunzi, from Xunzi. Mourning for the Public is about the dialogue between Xunzi and Lu Aigong. The original sentence is: the monarch, the boat also; Shu Ren, water also. The knife cuts bread and fingers. It means that kings are like ships and people are like water. Water can carry a boat, overturn it, and overturn it. "