Why am I afraid to let you know who I am?

This is the name of a famous psychological book. The essense of this book is that --- who am I is the only thing I have. If I let you know who am I and you reject me, then what else do I have? The essence of this book is also related to healing the child within. The shame projected toward us since our childhood from all the people, culture, and so on. The hidden serect prohibits the completely freedom we deserve.