Luke Arnold on the final scene between Silver & Flint, lightly edited for clarity:
I don't think the rage was what was so scary. [Silver] said he recognized the rage in himself. He saw it there and I think the deflation—he had that. He was like, "I want to see the world burn," and then after it, the moment Madi is back, it’s like, "Oh, that was...God." He got a glimpse, and even if he doesn't still see Flint is completely that, he got a window into it that he wouldn't have otherwise. For me, it wasn't that he thought it was rage at the end, which is why this needed to be stopped. The scariest thing for him was that Flint forgave him. That he was that stubborn. That he was that immovable, and whether it's about rage or not, once again, I think that Flint's clarity of like, “It's fine, we’ll put it back together.” Like, that’s freaky.
I think that was what was scarier. And by the end I think he no longer could see through Flint's eyes the way he did before, see the hope in humanity, that if you screw it all up and burn it down, that basic human decency will build something better. He could no longer see the ideal, you know, Flint's ideal and Thomas Hamilton's ideal, this whole thing that had been there, that was driving Flint. So that was gone, which is where that opaqueness, I think, came from, but I still think what he saw so clearly was just this would never stop. That whole idea that Flint would take an oar and walk until someone mistook it for a shovel. I mean, that died, too.
He was still hoping for that world, and so I think that's where [Silver] saw [Flint] very clearly at the end. He’s just going, “Well, if me sending men to kill you and turning on you so completely cannot shake you from the way you see this happening, I don't think you're seeing this clearly anymore.”
(Source: Fathoms Deep, episode 59)
