Between 1749 and 1771 the Swede Emanuel Swedenborg (1688–1772) wrote and published eighteen religious works in Latin that he claimed were the foundation of a new Christian religion. He wrote that he had been called by God to unlock the spiritual secrets of the Bible through the doctrine of correspondences; to reveal the nature of the spiritual world based on experience in that realm; and to explain the keys to living a heavenly life. Stating in his last work, True Christianity (paragraph no. 779) that he was called only to write and publish, Swedenborg never attempted to found a church. Swedenborg published his books in Amsterdam and London, and if his 1758 print runs of 1,000 for five different works are typical, he had thousands of books...