“以己度人”，汉语成语，意思是：拿自己的心思来衡量或揣度别人，用自己的心思去猜度别人，包含贬义。可以翻译为“judge others against one’s own value”，或用习语“ measure other people's corn by one's own bushel”表示。

例句：

因为他们自己历史上真的就这么干了上百年，所以现在以己度人。

Because they have been doing this themselves for hundreds of years in history. They are presuming others' behavior based on their own experience.