Hi, identifying one's inner identity can take a lifetime, due to social pressure, cross cultural influence and the requirement to take multiple roles has influenced individuals to hide their inner self. This is also a matter of perception. A person whose perception revolves around his own individuality would easily describe his inner self, contrary to this a person who is influenced by other peoples perception of him will always find it difficult to express differentiate his inner and outer self.
This is only a sample from the top of my head, with research, i can write you something awesome!.
Regards,
Zach