From Sylvia Plath's short story "The Shadow" (1959):
"Prepared as I was for the phenomenon of evil in the world, I was not ready to have it expand in this treacherous fashion, like some uncontrollable fungus, beyond the confines of half-hour radio programs, comic book covers, and Saturday afternoon double features, to drag out past all confident predictions of a smashing-quick finish.
"I had an ingrained sense of the powers of good protecting me: my parents, the police, the FBI, the American Armed Forces; even those symbolic champions of Good from a cloudier hinterland -- The Shadow, Superman, and the rest. Not to mention God himself. Surely, with these ranked round me, circle after concentric circle, reaching to infinity, I had nothing to fear. Yet I was afraid. Clearly, in spite of my assiduous study of the world, there was something I had not been told; some piece to the puzzle I did not have in hand."
I paid no attention to the above passage until recently.
"The Shadow" is an anti-hero detective character who gets revenge on evildoers. He starred in a radio show popular from the 1930s until 1954, remembered for its famous taglines, including "crime does not pay." From 1937 Orson Welles voiced the character [listen]. Young Sylvia Plath and her brother Warren were among the Shadow's millions of fans.
Plath spun up the story from a childhood memory: "Feeling of badness in the world unconquerable by good; war, death, disease; horror radio programs." [Journals, 28 December 1958].
"The Shadow," The Collected Prose of Sylvia Plath, P. Steinberg, ed., pp. 382-389.