[link to original on tumblr]
---&---
Take a good look at yourself and at meI'd been unsure of what exactly the last line was because in the liner notes to both The Decca Stereo Anthology and Zombie Heaven, it's mentioned that the original title was "I Believe in You," which doesn't sound all that different from "I'll be leaving you," specifically the "be leaving" and "believe in." (I think I even misremembered the original title as "I'll Believe in You.")
Turn right around, open-eyed you will see
When this day is through, I'll be leaving you
But now I'm pretty sure that the lyric is "I'll be leaving you," which works better with that modulation than "I believe in you" would.