Isostasy"The balance between changes within the Earth's crust, where material is displaced in response to an increase or decrease in mass at any point of Earths surface above. Such changes are frequently caused by advances or retreats of glaciers."
A representations of energy and balance. Where there is chaos, there is beauty. We retreat, but then we advance. We, as humans, are always trying to find balance just as the earth does. It is the practice of equilibrium. Just like glaciers on water, finding that perfect balance in life to just float.