“祸起萧墙”这个成语时常被人引用,那么“萧墙”是什么墙呢?萧墙是古代国君宫殿大门内面对大门起屏障作用的矮墙,又称“塞门”。萧墙的作用,在于遮挡视线,防止外人向大门内窥视。《论语集解》转引郑玄的解释说道:“萧之言肃 ”Curse Xiaoqiang “ This idiom is often quoted, then ”Xiaoqiang “ what is the wall? Xiaoqiang is the ancient monarch palace inside the door to play a barrier to the role of the low wall, also known as ”plug“. Xiaoqiang’s role is to block the line of sight to prevent outsiders from peeping into the door. The Analects of Confucius quoted ZHENG Xuan’s explanation as saying: ”Xiao’s remarks