"Kin" by Carl Sandburg Brother, I am fire Surging under the ocean floor. I shall never meet you, brother Not for years, anyhow; Maybe thousands of years, brother. Then I will warm you, Hold you

"Kin" by Carl Sandburg

Brother, I am fire

Surging under the ocean floor.

I shall never meet you, brother

Not for years, anyhow;

Maybe thousands of

years, brother.

Then I will warm you, Hold you close, wrap you in circles,

Use you and change you

Maybe thousands of years, brother.

What figurative device is used in the phrase "I am fire", found in the first line?