A silver cord is a part of a belief system called spiritualism. In spiritualism, it's believed that every person has an invisible silver cord connecting them to their spirit. It's believed that this cord extends from a person's spiritual being to the physical body, allowing for energy to flow between the two. This energy helps a person's spirit stay connected to the body so they can stay alive and healthy. Some people believe that the cord can be used to communicate with the spirit in the afterlife.