My Life Closed Twice Before Its Close

"My Life Closed Twice Before Its Close" was a poem by Emily Dickinson. It began contained the verse, "Parting is all we know of heaven, and all we need of hell."

Jack Harkness and Kathy Swanson tried it out as a possible passcode to unlock the Torchwood Hub, but it was actually the ISBN to Emily Dickinson: The Complete Poems. (TV: They Keep Killing Suzie)