Then what is the soul? Need an explanation to the not less important question: How is a mental thing to start a mechanical process? What a strange thought. How strange? Ayrton Senna if you no longer go for a gap that exists you’re no longer a racing driver poster. I decided to lift my arm – and so the arm lifts. Or I decide to follow the bus, momentarily behind my moving legs. Or I was thinking about something sad, and then I suddenly cried. So, there must be some mysterious connection between body and consciousness. That is the problem that prompted Descartes’ thinking. Like Plato, he believes that there is a clear line between ‘spirit’ and ‘matter’.