“Leonardo [da Vinci] was human. The acuteness of his observational skill was not some superpower he possessed. Instead, it was a product of his own effort. That’s important, because it means that we can, if we wish, not just marvel at him but try to learn from him by pushing ourselves to look at things more curiously and intently.”
— Walter Isaacson, “Leonard da Vinci” [2017]
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