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“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

“Nada mas caro, que objeto que no tiene precio.”
― David Mitchell, The Thousand Autumns of Jacob de Zoet