Who wrote " Love is not enough to keep the one you love from worry , fear and danger" ?

There is episode 28 in Twin Peeks TV series, The Black Lodge :


Major Briggs is tied up to a bullseye while Earle starts asking him questions about Owl Cave, He shots arrows at him, always deliberately missing each time. When he realizes Briggs won't talk, he gives him truth serum. He asks him what he fears most in the world, and he answers "the possibility that love is not enough" He tells Earle that he first saw the symbol in Owl Cave in dreams, but when Earle asks him what the signs mean, he starts talking in gibberish.
TWIN PEAKS Revisited Episode 28 The Path to the Black Lodge Nerdist