What song would the Sirens sing for Odysseus? What does he desire most in this world?

A [deadly] delightful sweet song that promises pleasure and knowledge.

The desire of Glory, just like the Iliad points out. The sirens also promise him the knowledge to victory.

Explanation:

According to Homer, Odysseus goes in his journey and when they pass near the sirens they hear a sweet honey song, which offer delight and knowledge.

For a moment, Odysseus (Ulysses) feel tempted to fall into the delights of the knowledge the sirens have to offer, But He's tied to the mast of the ship and the crew.

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