Rambam describes why it is important to study what exists in reality and then make conclusions regarding why things are the way they are. One should not decide first what he wants to prove and then pick and choose the odeas that support the conclusion he has already made. Rambam also introduces us to his idea that the Aristotelean idea of the eternity of the world can be used as a starting point to prove the existence of God, even though he believes in the creation of the universe.