When people try to define the nature of something, they will go to find something that does not possess this property. For example, there is a tennis, tennis day is like? He will be thrown to throw, jumping on the ground. Then I took it to the garden and the dog picked it up. If it rains, it will rot, or it may become loose. This is the day of tennis. Tennis has no interesting life, it will be called to fight, a variety of things happen in their body, and the dog's day is like? When they get out of bed, they usually think of food, make themselves warm, and find shelter. And he went back to the garden to find a tennis play some, and then go back to sleep, this is the dog's day. The same point is that people and dogs looking for shelter, longing …show more content…
That is, the spirit and the body must be composed of different substances. We should pay more attention to the "causal relationship" problem. The cause-and-effect problem was raised by Descarte by Elisabeth of Bohemia. She is a student of Descarte. She wrote to Descarte, saying that if we have this mental substance, then it does not affect our body? So, she said, in order to make things move, need another material things to influence it. For example, a stone to roll down the mountain, it must be someone to push it, or to an earthquake to shock it down. In order for humans to move, in order for them to make some changes in the world, there must be a physical force to change the physical state of our bodies to move us. However, if thought is a material composition, that substance must not be physical. But why can we communicate with the flesh to achieve the result of changing the world? Because the body can move, is an important feature of our thinking. If I want to answer questions in class, I will raise my hand. What made me lift my hand? Is "I know the answer," the idea. Because one of my thoughts, then thought, faith and desire, can lead to some kind of behavior in the flesh. She thought, spiritual material in the end and the physical substance is different? And how does this mental substance make the flesh move? This is the problem of causality, but also on Cartesian and his "entity dualism" of a