It is a powerful statement about the nature of power and authority. It suggests that the only way to truly rule is to be in complete control, even if that means suppressing or forcing submission from others.
Breakdown of the phrase:
* Nisi: unless
* Paret: submits (third person singular present active indicative of *parere*)
* Imperāt: rules (third person singular present active indicative of *imperare*)
The phrase has been used in various contexts throughout history, often to describe the relationship between rulers and their subjects. However, it also has a more general meaning that can apply to any situation where one person or group seeks to exert power over another.