Some say the world will end in fire,
Some say in ice.
From what I’ve tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice
Is also great
And would suffice.
The poem is about the world ending by fire or ice. The tone is about the world ending. The theme is the world ending. If the world ended it would either be by fire or ice. Fire and ice can be symbols because fire can be peoples temples and ice can be global warming.