"I don't understand," Ruth said.
"Look—those cities hold mankind's memory. I want to gather up the fragments of civilization before the last book is used for kindling and the last machine turns to rust. We need the knowledge in the cities if we expect to rebuild a civilization...."
"But Jason and Dr. Arnoldsson and the engineers—they know all about...."
"Jason and the engineers," Tom snapped. "They had to stretch themselves to the breaking point to put together this rocket from parts that were already manufactured, waiting for them. Do you think they'd know how to build a city? Dr. Arnoldsson is a psychiatrist; his efforts at surgery are pathetic. Have you ever seen him try to set a broken leg? And what about agriculture? What about tool-making or mining or digging wells, even ... what about education? How many kids your own age can read or write?"
"But the satellite...."
"The satellite won't be of any use to people who can't work the machines. The satellite is no substitute for knowledge. Unless something is done, your grandchildren will be worshipping the machines, but they won't know how to repair them."
"No...."
"Yes, Ruth," he insisted.
"No," she whispered, her voice barely audible over the static-streaked hum in his earphones. "You're wrong, Tom. You're wrong. The satellite will send us the power we need. Then we'll build our machines and teach our children."
How can you teach what you don't know? Tom wanted to ask, but didn't. He worked without talking, hauling the weightless tons of satellite packages into position, electronically welding them together, splicing wiring systems too intricate for his conscious mind to understand.