Pip forever changes throughout the novel. He not only changes physically when he grows up into the genteel society, but changes in his mind. Pip's identity seems to change him the most.
Even from the beginning, Pip never had his own personality. Never could be or do what he wanted. This puts a lot of pressure on his inner self. He never realized who he really was. He never had a chance to do what he wanted. Yet instead did what he was told. Charles Dickens never expressed Pip's inner self because Pip never had an inner self to project. From the Blacksmith he felt he was destined to be, he changed into the well-mannered educated Pip that he always thought he wanted to be. In the early chapters of the novel, he was always trying to better himself. He doesn't want to conform to the society issue that once poor always poor. This was the struggle between the weak and the strong. His inner-self was only telling him what the reader needed to know. Dickens wanted Pip to be the most complex character of the book. He wanted the reader to change with Pip and grow along with him. Dickens makes Pip only express in his actions what is needed to know. Dickens never writes about how Pip's inner-self really feels. This is to make readers interpret Pip in whatever way may be fit.
Pip's inner-self begins as a child. Pip was innocent beyond all reason. He was a frightened boy that was coaxed into helping out the escape convict, Magwitch. But he never meant to do any harm. His inner-self said conforming to what other people want you to do is right. But do we ever really know what he was thinking? Maybe Pip was frightened or even happy with the convict. Nobody knows really. Dickens let the reader decide on Pip's emotions. That's why Pip is a complex character.
Pip changes form this innocent boy to a responsible young adult. He takes on so many responsibilities it changes his inner-self from that innocence to a higher intelligent teen.