He feared madness far more than he did the invisible.
We don't fear dreams, but we do fear madness, and death terrifies us.
Should aught delay his departure, he feared madness, as Alicen's nearness tortured him.
He feared madness, other people and loneliness.
"Do you fear madness?"
He had never seen a dog go mad, nor did he have any reason to fear madness; yet he knew that here was horror, and fled away from it in a panic.
Without doubt, poor, terrified Amalie had reason to fear madness.