thinking about Finn and morality...
There’s no question that Finn is the moral center of the film, and for me this makes him the most compelling character: he’s repeatedly faced with choices that put his life on the line and ask him to prioritize either his regimented past or an uncertain future. We know from the beginning of the film that Finn exercises moral agency independent of his conditioning, and his refusal to fire on innocent civilians in spite of (or without considering?) the repercussions to his person signals that Finn’s moral agency tends in one direction (whereas, say, Kylo Ren’s agency tends strongly in the opposite direction). Yet this tendency doesn’t guarantee that Finn always makes choices that are, from our perspective as the audience, morally “right,” because his moral calculus exists alongside his survival calculus. Throughout the film, we see how these two forces alternate between harmony and tension.
Finn’s decision to defect from the First Order and rescue Poe is a key example of harmony between Finn’s impulses towards survival and morality. It’s a morally significant choice in Finn’s mind (and again, to us as the audience) because “it’s the right thing to do,” but it’s also absolutely vital for Finn’s own physical (and spiritual) wellbeing. Poe recognizes immediately that this is really a co-rescue (”you need a pilot!”), a team effort with mutual benefit, and for this reason, he trusts Finn and cooperates.
On the other hand, Finn’s second “defection,” from Rey and Han and Chewie at Maz’s place, exposes the possibility for tension between Finn’s survival needs - escaping the First Order - and his moral needs - the relationship he has established with Rey. Indeed, his speech to her contains two moral choices: first, coming clean about his identity and effectively betraying the trust they had built so quickly; and second, leaving Rey in order to pursue his own self-interest. I think it’s fair to argue that this second choice is actually ambiguous because Finn doesn’t necessarily understand how deeply his departure hurts Rey, and he does ask her to come with him (his intent isn’t specifically to abandon her). As he leaves, then, I think Finn senses that he has hurt Rey, but his need to survive has, for the moment, overridden his moral impulse towards care and compassion.
Finn’s choice to go back to Starkiller Base to rescue Rey is the precise inversion of his choice to leave her. Seeing the devastating consequence - Rey being carried off by Kylo Ren to further harm - of his previous choice to prioritize his survival over his relationship with Rey, Finn is determined once again to do “the right thing” for Rey. On its own, this choice is again morally gray, because it endangers the Resistance and requires Finn to lie. Yet Finn needs to right the wrong of abandoning Rey. His compassion overrides his self-preservation, and he goes back into the darkness to steady his own inner light.
If the Star Wars movies’ true center is the temptations faced by its heroes and its villains, then Finn’s temptation matters tremendously to how we understand TFA. Unlike Luke, Kylo, and Rey, Finn doesn’t get to make a choice about fighting or killing people (or not): instead, he’s tempted by a path that puts his own survival first. He’s enticed, perhaps, by a vague vision of himself retreating to the highlands, watering his crops, raising a family, unburdened by the forces of war that have shaped the galaxy around him. But I think he knows in his gut that such a life would be empty without Rey and the others he’s come to care for who are so deeply involved in this war. Charging back into the heart of the conflict to save Rey, in direct opposition to his survival calculus, is Finn’s redemption for having left her.
And so I think Finn and Rey’s embrace is a beautifully symbolic interaction on many levels, but it’s especially important for both of them because Finn’s coming back affirms the primacy and depth of their bond. Finn’s choice to return for Rey restores her trust in him, her belief that he values her; for Finn, Rey’s embrace is both joyful and relieving, because she doesn’t blame him or despise him for having left in the first place. And for both of them, as well as for us, it demonstrates Finn’s moral growth and his emerging clarity about what it means to be an upright person in his world.