golden rule
noun
1- a basic principle which should always be followed to ensure success in general or in a particular activity（确保成功的）指导原则。
1.1
- the biblical rule of 'do as you would be done by' (Matt. 7:12)圣经金箴“你想人家怎样待你, 你也要怎样待人”;“己所欲, 施于人”。（《马太福音》7:12）