" What is my sin, Blaise? Rudel was like that. A knife in the voice and in the thought behind. Quicksilver bright, insubstantial as a moon on water sometimes, then sharp and merciless and deadly as ... as an arrow dipped in syvaren. And the sharpness in his perceptions, as much as in anything else. A man from whom it was difficult to hide.

For the sin, the transgression, lay— and Rudel knew it, they both knew it — in his having given Blaise exactly what he wanted. "

― Guy Gavriel Kay , A Song for Arbonne