What is the origin of the idiom "the nature of the beast" and when to use it?

The idiom "the nature of the beast" has its origins in ancient idiomatic expressions and is found in various forms across different cultures and languages. It is used to refer to the inherent characteristics or qualities of a situation, person, or thing and suggests that certain behaviors, traits, or outcomes are to be expected due to the inherent nature or fundamental properties of the subject at hand.