The answer is that fire signifies desire and ice represents enmity. In Robert Frost's poem "Fire and Frost," the poet says: "Ice in the heart leads to anger,/ Fire on the hand creates fear." The poet is saying that if you harbor feelings of anger and fear they will show up in your life in the form of violence or crime. In short, fire means passion, action, strength, and ice means restraint, withdrawal, weakness. Together, they are a constant reminder that nothing is static; everything is in motion. This principle is seen in the natural world as well. Trees grow tall and strong in the winter when no energy is being used for growth; instead, their energy is being held captive within themselves so they can survive the cold season. When spring comes around, all of that stored energy is released at once, causing the tree to bloom immediately after the freeze-thaw cycle ends. This shows us that fire and ice are both necessary for life, but only fire gives off light and heat. When one lives a passionate life, there is always a chance they may feel angry or fearful at some point. These emotions don't go away simply because you want them to.