Snake eating its tail

A snake eating its tail in a dream is the dream's image of a system that has closed and is now feeding on its own output. The ouroboros is an old symbol; it stands for cycles that no longer need anything from outside themselves. The dream brings the image when something in your life — a circular argument, a self-sustaining mood, a project that keeps producing its own next step — is currently a closed loop that no external event is entering. A circle held calmly, the snake breathing through it, is the dream affirming the completeness of a true cycle. A snake biting in panic, the tail being consumed faster than the body can grow, is the dream noting that the closed system has tipped into self-harm, and the loop is now shrinking.