A friend recommended this form of mental healing to me, and I have been using it since. This is a very "New Age" format. The "White Brotherhood" is an old term for those who have evolved spiritually beyond the level of human into something beyond that. It signifies the entire spectrum of colors of light. Obviously, or perhaps not so obviously, it is not a term referring to skin pigmentation. It refers to beings of light, who may or may not also maintain a physical vehicle, what we call a body. The term I use most of the time is the Spiritual Hierarchy, those who would be termed adepts.
I was skeptical about the process, but have found that it is another means of intuitive guidance from suprapersonal levels, and it has healed some urgent and some not so urgent physical problems. It also works for psychological and spiritual problems.