The symbolic meaning is: death does not mean real death, but symbolic death, which means never coming back, and the past means. Then the past is the child who can't swim in the dreamer's own "you" The period of helplessness and lack of self-strength has passed and will never come back. Because you grew up, it was a good dream. It's the childish part, the incompetent part and the part that can't swim that dies. The past is your fault, and these faults will never come back. .