A white-haired man sits at a desk by night looking at a tall window whose reflection shows a misty, distorted copy of the room.

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Albert Einstein

Reality is merely an illusion, albeit a very persistent one.

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What it means

Our interpretation.

The words fans share are looser than the letter: Einstein was talking about time, specifically that past, present and future are not sharply divided, while the meme turns it into a claim that the whole world is unreal. That drift is why it suits mystics, science-fiction fans and Matrix-style posts. The original is quieter and sadder, a physicist consoling himself for a dead friend with his own theory.

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In context

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This is a popular paraphrase, not Einstein's exact words. The source is a letter of condolence Einstein wrote to the family of his oldest friend Michele Besso, a fellow patent-office engineer, after Besso died in Geneva in March 1955. Einstein wrote that Besso had gone a little ahead of him in leaving this strange world, which meant nothing, since for physicists who believe, the split between past, present and future is only an illusion, though a stubborn one. Einstein died about a month later, on 18 April 1955.

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