What is the origin of the idiom "there is a method to one's madness" and when to use it?

The idiom "there is a method to one's madness" has been in use for centuries, and it suggests that even when someone's actions seem strange or irrational, there is often a hidden or logical reason behind their behavior. It is commonly used in both formal and informal contexts to acknowledge that there might be hidden reasons behind seemingly chaotic actions.