Spiral

Spiral - a symbol of development and permanent changes. The development in the world committed to the principle of the spiral. Each round - the end of one cycle and the beginning of another. Spiral - a symbol of cyclical rhythms: the change of seasons, growth, and decreasing the moon, birth and death. Spiral - the rhythm of life.
Sometimes a spiral carved on gravestones, depicting the journey on the labyrinth afterlife world. Double helix (the snake on the caduceus, Daoist symbol of "yin-yang") symbolize the balance of opposites.
Spiral (spring) - a symbol of compressed energy.