Certain scientists say that the earth will someday be burned up by the sun.Other Scientists say that a new Ice Age will kill all lives on the earth. The poet compares the strong emotion of desire to fire. Knowing its destructive force on mankind, he thinks it likely that the world will end by fire. On the other hand, he compares hatred to ice. This,too, is a powerfully destructive emotion. Ice would also be capable of ruining the earth in the same way that hatred can ruin men.