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> ... he understood that he needed to grapple with Turgenev and Tolstoy to come into his own and fashion art for **the ages**.
>  ([Source](http://lareviewofbooks.org/essay/the-writer-as-reader-melville-and-his-marginalia/))
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This is in the plural here. But I think it should be singular because Hemingway was trying to make art for his age. "For the ages" refers to the now and the future, like "now Mandela belongs to the ages(history)".