theory of the invisible hand

The reading was about supply and demand. Adam believes with this theory of supply and demand he will get people to buy the products. He talks about economy becoming better through its consumers, since it is dependent on it.  When demanding on consumers the supply is going to vary from time to time. This can be very good for the economy and very bad it means at points thing may sell very well and your shop may be booming but then it could also mean that you shop could be out of business because its not selling anything because of a time in the year or just anything.