As a traditional psychotherapist, Dr. Brian Weiss, M.D., graduating Phi Beta Kappa, magna cum laude, from Columbia University and Yale Medical School, spent years in the disciplined study of the human psychology, training his mind to think as a scientist and a physician.
He held steadfastly to conservatism in his profession, distrusting anything that could not be proved by traditional scientific method. But when he met his 27-year old patient, Catherine, in 1980, who came to his office seeking help for her anxiety, panic attacks, and phobias, he was taken aback at what unfolded in the therapy sessions that followed, which jolted him out of his conventional ways of thought and psychiatry.
Source: About Many Lives, Many Masters
Many Lives, Many Masters was written by Brian L. Weiss. It was published in 1994.