Soren Kierkegaard The Concept of Dread, Chapter V (page 139) quote:
And no Grand Inquisitor has in readiness such terrible tortures as has dread, and no spy
knows how to attack more artfully the man he suspects, choosing the instant when he is
weakest, nor knows how to lay traps where he will be caught and ensnared, as dread
knows how, and no sharp-witted judge knows how to interrogate, to examine the accused,
as dread does, which never lets him escape, neither by diversion nor by noise, neither at
work nor at play, neither by day nor by night.
Also quoted in full in Rollo May The Meaning of Anxiety, Chapter 2 “Philosophical
Interpreters of Anxiety” (page 49). Rollo replaces the translated word “dread” with
“anxiety”.
Note: The Concept of Dread was originally published June 17, 1844
Wikipedia entry http://en.wikipedia.org/wiki/The_Concept_of_Dread