In the context of the phrase "I am their right hand" or "I am their left hand," it typically refers to someone's trusted and reliable assistant or close ally. The terms "right hand" and "left hand" are metaphors that draw from the idea that the right hand is usually dominant and skillful in most individuals, while the left hand is considered the non-dominant hand.
When someone says, "I am their right hand," it means that they play a crucial and supportive role in that person's life or work. They are someone the person depends on, someone who helps them with various tasks, decisions, and responsibilities. It indicates a high level of trust and importance in the relationship.
Similarly, when someone says, "I am their left hand," the meaning remains the same – they are seen as an essential and trusted assistant or ally, just like the right hand.
In summary, both expressions imply being a significant and reliable support or confidant to someone, assisting them in various aspects of their life or endeavors.