The silver cord of esoteric tradition links the soul to the body during sleep. It is read as the bond that keeps you anchored while your mind roams far away.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.