136. To end with I talked with the spirits from that world about various achievements of our world. I told them especially about our possession of sciences unknown elsewhere, such as astronomy, geometry, mechanics, physics, chemistry, medicine, optics and philosophy. I went on to mention techniques unknown elsewhere, such as ship-building, the casting of metals, writing on paper, the diffusion of writings by printing, thus allowing communication with other people in the world, and the preservation for posterity of written material for thousands of years. I told them that this had happened with the Word given by the Lord, so that there was a revelation permanently operating in our world.