I highly recommend the Enneagram as a spiritual tool
If you no experience with this powerful system for self-understanding I recommend "The Enneagram Made Easy" by Renee Baron and Elizabeth Wagele.
Recently I have been another book, "The Spiritual Dimension of the Enneagram: Nine Faces of the Soul" by Sandra Maitri. There is a chapter in this book that described how we get separated from our true self. I am encouraging all of my clients and people seeking spiritual direction.
I am putting a link to a pdf copy of this chapter. Here is the link to the chapter. I believe you will find it useful.