"Oh leave the Wise our measures to collate. One thing at least is certain, light has weight. One thing is certain and the rest debate. Light rays, when near the Sun, do not go straight."

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To me the question is always this: if a ray of light came out of the sky and said, "Your next book will never be published - would you still write it?" If the answer is yes, the book is worth writing.

— Markus Zusak