How does Athena disguise herself when she meets with Odysseus? What do you think is homers purpose and having Athena disguise herself.

She disguises herself as a Mentes, an old family friend of Odysseus. This shows Athena's ability to shapeshift. The Gods cannot let humans see their true form or they (humans) would be blinded of catch fire. Athena uses Mentes because he represents loyalty and trust.