From Chapter 1 November 17, 1989 Dear Cardinal Lustiger, Your Eminence: My name is Daniella Stonebrook Blue. I am-or was-by profession an astronomer. We are strangers to each other. Your name was given to me by a woman on a bus as we were traveling across New Mexico. Because of her insistence, I am writing to you about this dark period of my life. I need to speak to you about the matter of light. Light is the alphabet of God. I knew this when I was born and then I forgot. This is the first time I have understood it as an adult woman. Even as I prepared to write these words, I didn't know what they implied until they appeared on the page.