“It's not what you don't know that kills you but what you know that isn't so.”
The Deadline (1997), p. 284.
The quote "It's not what you don't know that kills you, it's what you know for sure that ain't true." is famous quote attributed to Mark Twain (1835–1910), American author and humorist.
Variant: What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so.
“It's not what you don't know that kills you but what you know that isn't so.”
The Deadline (1997), p. 284.
“You don't know what I'm all about / Like killing cops and reading Kerouac”
"Boxcar"
24 Hour Revenge Therapy (1993)
“The thing that you know to be true is the lie that will kill you.”
Source: Soldiers Live (2000), Chapter 5, “An Abode of Ravens: Headquarters” (p. 384)
The Complete Neurotic's Notebook (1981), Unclassified
“Love is a kind of killing, Addy," she says. "Don't you know that?”
Source: Dare Me
Kiss That Frog
Song lyrics, Us (1992)
“Alison, I know this world is killing you.
Oh, Alison, my aim is true.
My aim is true.”
Alison
Song lyrics, My Aim Is True (1977)
"Sometime they'll give a war and nobody will come."
"The People, Yes" (1936)