It came to me in the very horror of the immediate presence that the act would be, seeing and facing what I saw and faced, to keep the boy himself unaware. The inspiration—I can call it by no other name—was that I felt how voluntarily, how transcendently, I might. It was like fighting with a demon for a human soul, and when I had fairly so appraised it I saw how the human soul—held out, in the tremor of my hands, at arm's length—had a perfect dew of sweat on a lovely childish forehead.

Ch. XXIV. - The Turn of the Screw (1898)