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The only thing that can make you rich is your mind.
I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.
El verdadero viaje no es buscar nuevos paisajes, sino tener nuevos ojos.