Diamond Sutra is not quite what it seems.

The oldest dated printed book in the world is not from Gutenberg’s press. It was printed in China nearly six hundred years before Gutenberg was born — on May 11, 868 CE — and we know the exact date because the printer wrote it down. The Diamond Sutra is a sixteen-foot scroll, printed from carved wooden blocks, and its colophon reads: “Reverently made for universal free distribution by Wang Jie on behalf of his two parents.” The first mass-produced book was a prayer for Mom and Dad.

The technology is woodblock printing, and the Chinese had been perfecting it for centuries. A craftsman carved a page’s entire text — in reverse — into a wooden block, inked it, and pressed paper onto it. One block, one page; a book needed a block for every page. It was laborious to set up but revolutionary in output: once the blocks were cut, hundreds or thousands of identical copies could be printed. The Diamond Sutra’s seven printed sheets were pasted into a single scroll nearly five meters long, opening with an exquisite frontispiece illustration of the Buddha preaching — itself one of the earliest printed pictures in existence.

The text is a Buddhist scripture, the Vajracchedikā Prajñāpāramitā Sūtra — the “Diamond Cutter” perfection-of-wisdom sutra, in the Chinese translation by the great Kuchean monk Kumārajīva from around 400 CE. Its teaching is characteristically dizzying: all phenomena are like “a dream, an illusion, a bubble, a shadow.” But the physical object mattered as much as the philosophy. Printing sutras was an act of devotion — reproducing the Buddha’s words multiplied one’s merit — and the colophon’s dedication “for universal free distribution” shows the printer understood exactly what the press made possible: the word, multiplied, given away.

How it survived is its own story. The scroll was found in 1907 in the sealed Library Cave at Dunhuang — walled up around the year 1000 with 50,000 other documents and forgotten for nine centuries. The explorer Aurel Stein acquired it there, and it now resides in the British Library, where it has been conserved, digitized, and studied as the crown jewel of printing history. The dry desert air preserved what humidity would have destroyed; the paper, the ink, and even the yellow dye of the frontispiece survived a thousand years in the dark.

Consider what the date means. In 868 CE, when Wang Jie’s blocks were pressing ink to paper, Europe was in the depths of the early Middle Ages — every book on the continent was being copied by hand, letter by letter, in monastery scriptoria. Movable type wouldn’t reach Europe for nearly six hundred years. The Chinese were already printing almanacs, calendars, and scriptures by the tens of thousands — and doing it, in this case, not for profit but as an act of love, “on behalf of his two parents.”

The Diamond Sutra teaches that all things are impermanent — like a flash of lightning, like a dream. The irony is perfect: a sermon on impermanence became the most durable printed thing in the world, surviving eleven centuries to remind us that someone, in 868, believed a book was worth making beautifully and giving away free.