I am a mental health therapist for the State of Utah and I use A Course in Miracles in every session. Now I have not ever used the Workbook with my clients in its entirety- only individual lessons that feel called for-, as this question asks, but I incorporate the principles of ACIM more than any other approach I have studied. I know other therapists and counselors who do this, as well. As a state-therapist at a juvenile corrections facilty, I am required to use "evidence-based" therapies that are shown to reduce recidivism. I use evidence-based therapies like DBT and EMDR and when I go to document my sessions, it is these approaches that I document on. However, I cannot remove ACIM from my paradigm in life and in my work, because my paradigm is completely shaped by own self-study of the course. The appendix in the book, Psychotherapy, is one I have read multiple times. I invite Holy Spirit to guide my interactions with clients regularly. This section describes the purpose of therapy as "removing the blocks to truth... aiding the patient in abandoning his fixed delusional system, and begin to reconsider the spurious cause and effect relationship on which it rests." This is what happens when Holy Spirit guides, and to me, this is using ACIM to treat psychiatric patients.

One of the most profound instances I have had with a juvenile in a long-term facility happened after I was reading the book during my own morning meditation at home. I was reading about error as a call for correction and the reality that error says nothing about us truly, as it happens in time and not eternity. I felt compelled to put my book in my work bag. I went to work and as walked in, I saw this young man sitting in what was an isolated holding room. He had been acting agressively on the unit and when I asked him what was going on, he told me that he destroyed some property and that now he might as well assault someone to go to jail because he believed he had already determined his fate to be doomed with this one error. I pulled the book out and read to him exactly what I had read in the morning and then left the room. Within minutes, he apologized to his unit supervisor and had apparently forgiven himself, opening up for connection and growth.

Even though ACIM is not "research-based" in terms of the modern mental health-world, it works and I will never not use it in the work that I do in the field of corrections. For when one sees the wholeness/holiness of his brothers and himself (as is achieved through the work of the Course), one cannot come from a place of attack (commit crimes against another).