Analysis of The Immortals

I killed them, but they would not die.
Yea! all the day and all the night
For them I could not rest or sleep,
Nor guard from them nor hide in flight.

Then in my agony I turned
And made my hands red in their gore.
In vain - for faster than I slew
They rose more cruel than before.

I killed and killed with slaughter mad;
I killed till all my strength was gone.
And still they rose to torture me,
For Devils only die in fun.

I used to think the Devil hid
In women’s smiles and wine’s carouse.
I called him Satan, Balzebub.
But now I call him, dirty louse.