An anon started an interesting dig on Keystone:

"Marianne Williamson ACIM MKUltra

PRECIOUS & DECEPTION: THE ROAD BACK TO NAZI SPIRITUAL SCIENCE AND MK ULTRA

Paragraphs referring to Marianne Williamson

Dr. William Thetford, Professor of Medical Psychology, Columbia University, New York, assisted Dr. Helen Schucman as a ‘scribe’ in the initial channeling of the “A Course in Miracles “(ACIM) book originally published in 1975 by an organization called The Foundation for the Investigation of Para Sensory Phenomena.

From 1971 to 1978, Dr. William Thetford, along with a David Saunders, headed CIA MK-ULTRA Subproject 130: Personality Theory while at Columbia University. In other words, Dr. Thetford was working for the CIA conducting TOP SECRET Personality Theory of Conversion Hysterics experiments under MK-ULTRA at the same time he was the scribe for the 1975 ACIM book. [19] 

After graduating from college in 1949, Thetford worked as a research psychologist in both Chicago, and later in Washington, DC. According to Colin Ross, from 1951 to 1953, Thetford worked on Project BLUEBIRD, an early CIA mind control program that led to MK ULTRA. He spent 1954 and 1955 as the director of clinical psychology at the Institute of Living in Hartford, Connecticut. From 1955 to 1957, he was an assistant professor of psychology at Cornell University’s CIA-funded Society for the Investigation of Human Ecology.

In 1958, he accepted an assistant professorship, which later developed into a full professorship, at the Columbia University College of Physicians and Surgeons. During a portion of this same period he also served as the director of clinical psychology at the Columbia-Presbyterian Hospital. It was here that he would stay for the next 20 years, and it was here that he first met Dr. Helen Schucman, hiring her as a research psychologist and assistant.[20]

In other words, at the time that Dr. Schucman channeled ACIM, from a voice she resonated from a master named JESUS, she also working for the CIA[21] as a MK ULTRA mind bended (hallucinogenic drugs, hypnosis, sensory deprivation, psychic driving) guinea pig. 

https://mindcontrolblackassassins.com/tag/marianne-williamson/

http://archive.is/mezrg

Oprah, The CIA Keystone Spiritual Awakening: “A Course in Miracles “

Reading through the MK-Ultra/ACIM article. This phrase stuck out to me. 

Oprah, The CIA Keystone Spiritual Awakening: “A Course in Miracles “

I did a search on CIA Keystone. Here are some of the results from the cia page that talk about keystone. 

 https://www.cia.gov/kids-page/k-5th-grade/a-birds…cia…/cia-headquarters.html

Apr 15, 2007 - Established in 1947 and located in Virginia, the Central Intelligence Agency is the keystone of the Intelligence Community. The Agency, unlike …

Chapter One — Central Intelligence Agency

https://www.cia.gov/library/center-for-the-study-of…u…/chapter_1.htm

Mar 16, 2007 - DCI Allen Dulles in 1961 used the word “keystone” to describe CIA's place in the Intelligence Community, and in 1994 DCI R. James Woolsey …

In this context, is the cia the keystone that once removed cause the whole thing to collapse?

http://catalysthealingarts.net/wp-content/uploads/2018/05/Eckhart-Tolle-Apology-Letter.pdf

https://youtube.com/watch?v=RdjPDCkD4Ws "