For example, if you say bad things about a person, the person might protest and say "Do not bad mouth me."

VOA: special.2010.06.20

So, your superego isn't only telling you not to do bad things, it's telling you not to think bad things.

超我不仅要求你别干坏事，还要求你不要有做坏事的想法。

耶鲁公开课 - 心理学导论课程节选