Julia Quinn said this quote
“ Sebastian got up and walked to the window, resting his forehead against the pane. It was cold outside, and the icy chill pressed up against him through the glass. He liked the sensation. It was big. Grand. The sort of vivid moment that reminded him of his humanity. He was cold, therefore he must be alive. He was cold, therefore he must not be invincible. He was cold, thereforeHe stood back and let out a disgusted snort. He was cold, therefore he was cold. There wasn‘t really much more to it. ”