We turn to Liebniz and we continue to see the world slipping away as he discusses the monad. In looking at the things that Liebniz said it is believed that monads (Entelechy) are not physical or mental but biological. Therefore, the ultimate cogs of the world are biological elements or Entelechies. In doing this there is no distinction made between inanimate and animate objects, which would make everything, animate. If these monads are really just biological there is no way that they can make changes in each other. The only way for this to happen is if God caused these changes to happen.The reason that monads cannot bring changes in bodies is because that is not what they were programmed to do. They were created so that compound substances could be made. The biological nature of Monads makes their essential qualities to be apperception and appetition and even motion itself. Their relation is more of a final cause than an efficient cause. This is why he considers final causes as the principle of efficient causes and gives priority to final causes. Therefore, this made it hard for a monad to bring change in a body.As we can see, God is the unifier of the monads but he also brings harmony. Leibniz came to the conclusion, by using metaphysics and the nature of monads, that God was the ultimate monad and the Creator of this world. We are now at a point where nothing is the same. We believed in one thing but now it is completely different.The first problem that Berkeley would have with this objection is the fact that ideas cannot exist if they are not perceived. If we cannot perceive of the idea then there is no way that we can truly conceive of the thing. For example if I do not have the idea of the sky being blue then there is no way that I am going to walk outside, look up, and say the sky is blue. I do not have the concept of blue in the first place.