"[be] (only|just|) a matter of time" 的定义和意义

What is the origin of the idiom "be a matter of time" and when to use it?

The idiom "be a matter of time" is used to convey the idea that a particular event or outcome is inevitable and will occur in the future, although the specific timing may be uncertain. Its origin is not precisely documented, but it has been used for many years to indicate the inevitability of a situation.