Definition & Meaning of "[be] {one's} own (master|mistress)"

What is the origin of the idiom "be one's own master" and when to use it?

The origin of the idiom "be one's own master" can be traced back to the concept of personal autonomy and self-determination. It draws upon the historical context of servitude and societal hierarchies, where individuals were often subject to the control and authority of others. The phrase evolved as a symbol of liberation, representing the desire for freedom from external influences and the ability to govern one's own life. It emerged from a collective yearning for independence and the right to make individual choices without interference. It is commonly used in discussions about personal empowerment, self-reliance, and individual agency.