承诺是骗子对傻子说的誓言是傻子对骗子说的
[chéng nuò shì piàn zi duì shă zi shuō de shì yán shì shă zi duì piàn zi shuō de]
This statement expresses mutual deceit - both the promise and vows made by two parties who tricked each other into believing something false. It portrays cynicism about promises.