The Atlantic ‘It Seems That I Know How the Universe Originated’ The theoretical physicist Andrei Linde may have the world’s most expansive conception of what infinity looks like. Updated at 3:27 p.m. ET on February 9, 2021. In Jorge Luis Borges’s story “The Book of Sand,” a mysterious Bible peddler knocks on the narrator’s door and offers to sell him a sacred book he came by in a small village in India. The book shows the wear of many hands. The stranger says that the illiterate peasant who gave it to him called it The Book of Sand, “because neither sand nor this book has a beginning or an end.” Opening the volume, the narrator finds that its pages are rumpled and badly set, with an unpredictable Arabic numeral in the upper corner of each page. The stranger suggests that the narrator try to find the first page. It is impossible. No matter how close to the beginning he explores, several pages always remain between the cover and his hand: “It was as though they grew from the very book.” The stranger then asks the narrator to find the end of the book. Again, he fails. “This can’t be,” says the narrator. “It can’t be, but it is,” says the Bible peddler. “The number of pages in this book is literally infinite. No page is the first page; no page is the last.” The stranger pauses and reflects. “If space is infinite, we are anywhere, at any point in space. If time is infinite, we are at any point in time.”