A key holds a unique duality, both unlocking and locking, embodying a fascinating balance of opposing forces. In magical terms, this concept is often referred to as ‘antagonistic,’ a principle that reflects the key's ability to be on both sides of the same argument.
The phrase "under lock and key" exemplifies this antagonistic nature—it's more than just 'under lock' or 'under key.' The combination of both elements underscores the key's power to control access: turn the key one way to secure something, restricting access, and turn it the other way to unlock and grant freedom. This interplay highlights the essential relationship between the lock and its key—each relies on the other to function, demonstrating their interconnected and opposing roles.
