My youngest daughter has been obsessed with Moana for the past few months. She insists that I sing the entire soundtrack to her every night before bed, so I've become pretty familiar with the lyrics. In my opinion, the best line in the movie is in the song "We Know the Way".
We read the wind and the skyWhen the sun is high
We sail the length of sea
On the ocean breeze
At night we name every star
We know where we are
We know who we are, who we are
The dominant theme of the movie is discovering who you really are, and it's powerful to me that Moana's ancestors knew -- both her grandmother, and the chieftain in the musical vision that her grandmother led her to. He knows who he is because he knows where he is: his ability to navigate the open ocean is what gives him the power to fulfill his purpose and comprehend his identity.
Later the demi-god Maui gives this power to Moana in a sequence that is critical to Moana's destiny without being overtly supernatural. At the end of the movie she returns to her island and her people, but it's impossible to think of Moana as a mere human anymore after having touched the gods.
