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But with their backs against the wall, the Beatles produced an album far ahead of anything they’d done before. Since these guys were riding new levels of musical fluidity and inspiration, firing on so many more cylinders than anybody else had, they stumbled onto discoveries that changed the way music has been made ever since. It was an accidental masterpiece—but one that stunned them into realizing how far they could go. After that, they went full-time into the masterpiece-making business. Yet unlike some of their later artistic statements, this one was fun to make, and it shows. It’s where the Beatles became the Beatles. For artists like Stevie Wonder and Marvin Gaye, it was a model of artistic independence. Brian Wilson was still writing surf hits until he heard this record. The morning after his first listen, he sat at the piano and wrote “God Only Knows.” As he said, “We prayed for an album that would be a rival to Rubber Soul.
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Rob Sheffield (Dreaming the Beatles: The Love Story of One Band and the Whole World)