„Someone told me that each equation I included in the book would halve the sales. I therefore resolved not to have any equations at all. In the end, however, I did put in one equation, Einstein’s famous equation, E = mc^2. I hope that this will not scare off half of my potential readers.“

— Stephen Hawking

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„Everyone knew that if you divided reality by expectation, you got a happiness quotient. But when you invert the equation - expectation divided by reality - you didn't get the opposite of happiness. What you got, Lewis realized, was hope.“
— Jodi Picoult
„It is very hard to write this way, beginning things backward, and the author hopes the reader will realize this and not grudge this little word of explanation. I know I would be very glad to read anything the reader ever wrote, and I hope the reader will make the same sort of allowances. If any of the readers would care to send me anything they ever wrote, for criticism or advice, I am always at the Café du Dôme any afternoon, talking about Art with Harold Stearns and Sinclair Lewis, and the reader can bring his stuff along with him, or he can send it to me care of my bank, if I have a bank.“
— Ernest Hemingway
„Einstein was once asked how many feet are in a mile. Einstein's reply was "I don't know, why should I fill my brain with facts I can find in two minutes in any standard reference book?“
— Albert Einstein
„You pierce my soul. I am half agony, half hope… I have loved none but you.“
— Jane Austen