Rachel Caine said this quote

„We didn’t anticipate that the formula would trigger such a violent response. In the future, you’ll only receive the unprocessed raw materials.”“So it’s because I’m young.”“No,” he said. “It’s because you’re young and you refuse to acknowledge what you are. What it means. What it promises. You’re fighting your condition, and that makes it almost impossible for you to control yourself. You need to admit it to yourself, Michael. You’ll never be human again.