《管子·牧民》
国有四维，缺了一维，国家就倾斜；缺了两维，国家就危险；缺了三维，国家就颠覆；缺了四维，国家就会灭亡。
国有四维，一维绝则倾，二维绝则危，三维绝则覆，四维绝则灭。
A state has four principles. If one is missing, the state will be inclined; if two are missing, the state will be endangered; if three are missing, the state will collapse; if all four are missing, the state will perish.