What is the origin of the idiom "on the other side of" and when to use it?

The idiom "on the other side of" in the context of age does not have a specific origin, as it is a literal and straightforward phrase. It is often used to refer to someone who has reached or crossed a certain age or stage of maturity, and is typically used in a neutral or straightforward manner to describe someone's age or stage of life.

What is the origin of the idiom "on the other side of something" and when to use it?

The idiom "on the other side of something" draws upon the concept of physically crossing from one side to another, which has been used metaphorically to represent progress or transformation in various contexts. The phrase itself has likely emerged through the natural evolution of language and has become a commonly used expression to convey the idea of successfully moving past a difficult situation.