What are the themes presented in Odyssey 19?

Odyssey 19 in which the level of
building suspense is taken to another level. Odysseus and Telemachus begin hiding
weapons so that the suitors will not be able to fight
back.

The disguised Odysseus and Penelope also have a
lengthy encounter in which Odysseus tells her a story about having seen Odysseus alive.
In contrast, Penelope tells the disguised Odysseus about a dream she has had, a dream
which Odysseus interprets as indicating that Odysseus will soon bring about the
destruction of the suitors.

Also in Book 19, the aged
maidservant Eurycleia recognizes Odysseus, but he tells her to keep his identity a
secret:

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‘Nurse, will you destroy me, you who suckled me
at your breast? I am home indeed after twenty years of toil and sorrow, but now a god
has inspired you and you have found me out be quiet and keep it from all the rest of the
house.

Thus, in looking back
at Odyssey 19, this book appears to touch upon the theme of
identity. Odysseus is moving closer and closer to revealing his identity to all those
present in the household and thus is moving closer and closer to "being his old
self."