This week's Final Word comes from one of the earliest reflections on the natural world:
"Now, we proved earlier, during our lectures on nature, that there cannot be an infinite magnitude, and we proved just now that it is impossible for something finite to have infinite power. The first agent of movement, however, causes eternal movement and does so for an infinite time. It is clear, then, that it is indivisible, and has no parts or magnitude."
The winner of last week's competition, who correctly identified Richard Dawkins's Selfish Gene , is M. F. Gunn of Ascot.