Nada

“Solving a problem for which you know there’s an answer is like climbing a mountain with a guide, along a trail someone else has laid. In mathematics, the truth is somewhere out there in a place no one knows, beyond all the beaten paths. And it’s not always at the top of the mountain. It might be in a crack on the smoothest cliff or somewhere deep in the valley.”
― Yoko Ogawa, The Housekeeper and the Professor

“Don’t go around saying the world owes you a living. The world owes you nothing. It was here first.”
― Mark Twain

“He was, I told myself, a unique experience in my existence; I never think definitely of him as man or boy, as older or younger, taller or shorter than I am, but always of him as a mind in tune with mine, in which many of the notes are quite different from mine but are all in the same key.”
― Vera Brittain, Testament of Youth

“Books can't live your life for you. The reader who forgets to walk on his own two feet is like an old encyclopaedia, his head stuffed with out-of-date information. Unless someone else opens it up, it's nothing but a useless antique.”
― Sōsuke Natsukawa, Il gatto che voleva salvare i libri