What is the origin of the idiom "have a mind of one's own" and when to use it?

The origin of the idiom "have a mind of one's own" is rooted in the concept of individual agency and independent thinking. It reflects the fundamental human capacity to possess unique thoughts, perspectives, and preferences. The idiom emerged from the recognition that each person has their own distinct consciousness and the ability to make choices based on their own reasoning and judgment. It emphasizes the importance of autonomy and self-determination, suggesting that individuals should not be easily swayed or controlled by external influences. It is commonly used in discussions about personal autonomy, individuality, and free will.