Lyric discussion by Alsatian 

The whole song is a study of reality through the lens of opposites: inside vs. outside, fact vs. fiction, heart vs. brain. When looking at something, which view shows the soul or the truth of the matter, and which is just a shadow or filter of the truth.

In the midst of his loneliness in the aftermath of being left, he's perfecting his idea of what he had. He's longing for a perfection that he never really had. Is he longing for fact or a fiction he's created for himself?

The first stanza sets this up with the heart vs. the mind contradiction. The eye with vision (just like the heart with relationships) is the first receptor, the first judge. Because, it's first, is it closer to the original and therefore more true? or is the brain more true after it's had time to correct our eye's vision. Our brain tends to do the same thing to our heart after a while in a relationship. The brain is always catching up with our instincts.

By repeating "turns you around" several times, he's emphasizing that the brain does more than just a physical function of inverting an image, but the brain also locks onto the idea and dwells on it, dissects it, considers it over and over again and thinks it over constantly.

But is all that thinking and interpretation bringing him closer to the truth, or further from the truth. Did he really have a perfect relationship, or is he weaving a myth of perfection. Which is fact, which is fiction? The heart or the mind?

In the last lines of the song I think he realizes that he's longing for a false perfection. His reality is that he's alone now. That's the fact. The fiction is the relationship that's now over: they were together, but it couldn't work because it wasn't true. All the time they spent together was just a sham because at the heart of the matter it couldn't work.

i think this is the closest thing to an honest and true interpretation... great job!

Ben? is that you?

@Alsatian Jesus, Death Cab is so fucking brilliant. I can't even this song right now. Just nails what I'm feeling right now. And yeah, your comment is exactly on point.

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