If you want to follow up on the research Josh Knobe has been doing with his colleagues on the true self, you can check out the following piece for the New York Times:

In Search of the True Self,’ Josh Knobe

Or, for a more detailed presentation, you can read:

Beliefs About the True Self Explain Asymmetries Based on Moral Judgment,” George E. Newman, Julian De Freitas, and Joshua Knobe

Happy reading!