"One thing that I discovered about myself is I really don't like traveling. I feel like it's a terrible personal failing, but I was so satisfied to arrive at the conclusion."

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Biot, who assisted Laplace in revising it [The Mécanique Céleste] for the press, says that Laplace himself was frequently unable to recover the details in the chain of reasoning, and if satisfied that the conclusions were correct, he was content to insert the constantly recurring formula, 'Il est àisé a voir' [it is easy to see].

— W. W. Rouse Ball