⒈ 就拿这个人整治他人的方式，反过来整治这个人本身。
英do unto them as they do unto us; answer a fool according to his folly; deal with sb. as he deals with you; does sb. with his own physique; give sb. a dose of his own medicine; pay sb. back in his own coin; requite like for like; pay back in kind;
⒈ 就用那个人对付别人的方法来对付他本人。
例如：「他如果再使坏心眼陷害你，你即以其人之道，还治其人之身，叫他尝尝痛苦！」