There have been many citations as to why Levi chose to resurrect Armin over Erwin
But I've this theory that it might be because of another reason other than just letting his friend finally rest in peace and not be in guilt for letting so many soilders die. The sea might have a lot more significance.
Armin was always about how he wanted to see the Sea. The night before the Shiganshina fight when Mikasa Armin and Eren where outside they talked about how Armin was sure of the existence of the sea. Levi was eavesdropping .
Earlier we see he asks Erwin that what his plans were once they overcome the mission.
Edward seemed blank and answers that they'd know once they get there.
I think this also influenced Levi's choice.
Armin had a hope, aspiration and urge to know beyond the walls into the vast open sea while Erwin was limited in his aspiration as to the basement and the walls.
While Armin was symbolic of progress and hope, Erwin was a reminder of past and stagnation.
And we know that Kenny influenced Levi on his death bed by saying people need something to keep moving on.
Armin had that zeal, he had the sea, the places to look forward to and aspire to enjoy. But Erwin was limited in his imaginative and his zeal ended till the basement.
The sea is like a juncture of the past and the future. A turning point where Eren draws a parallel to the utter naivety of his former self in thinking there was freedom across it. Armin comes to term with his new life or resurrect life rather.
And Levi I think comes to term with his doubts with himself about his choice.
In short the sea become the turning point in lot of ways more than just being a miraculous thing they're seeing for the first time.
It's a theory.
Does anyone else have same thoughts?