司馬昭之心，路人皆知 Sīmǎ Zhāo zhī xīn,lùrén jiē zhī[Sima Zhao's ill intention is obvious to everybody in the street;the trick is all too evident to the man in the street] 《三國志·魏志·高貴鄉公紀》裴松之注引《漢晉春秋》記載,魏帝曹髦在位時(shí),大將軍司馬昭,獨攬大權,圖謀篡位,曹髦一次氣憤地對大臣說(shuō):“司馬昭之心,路人所知也。吾不能坐受廢辱,今日當與卿自去討賊?！焙笥谩八抉R昭之心,路人皆知”比喻人所共知的陰謀、野心