You start Saul, and end up Paul,' my grandfather had often said. 'When you're a youngun, you Saul, but let life whup your head a bit and you starts to trying to be Paul - though you still Sauls around on the side.
We must be optimistic about the future because it's a self-fulfilling prophecy. If we are creative and ambitious, intelligent machines will liberate us and be as profound a boon to our prosperity as electricity. If we are fearful, and fail to press ahead, we could be overwhelmed by automation and inequality.