Most of us would think that 'intention' or 'want' is an integral part of 'self'. However, during open brain surgeries, scientists have used electric stimulation on certain parts of the patients' brain to generate subjective intentions/feelings like 'I want to move xxx' according to the patients' report.
From this experiment(and Jose Delgado's), such simple 'intention' or 'want' might be directly generated by precise electric shocks. It's likely that with more subtle and elaborate electric stimulation, your subjective feeling of goals/ambitions can be generated this way, too. If that's the case, would you still regard the ambitions as part of the 'self'? How would you reconcile your ambitions with the possibility that all the feelings/will might be just something inserted in you by someone using electric shocks?