Who is the speaker in the poem fire and ice by Robert Frost?

It's a relatively short poem, so you could read it as fast as read a summary of it:

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.

-Robert Frost

If you're looking for an analysis of this poem, you should be more specific in your question.