Louise Hay is the founder of the Hay House publishing firm, whose vision is to make humanity as stupid as remotely possible. It is devoted to publish the most insane self-help authors, woomeisters and gurus (and is financially pretty successful), in addition to sponsoring tours, radio shows and forums. Their area of specialty is quantum woo and the Law of attraction. Among their authors are Sylvia Browne (who has already been covered), Esther Hicks (who will be covered shortly) and Doreen Virtue.
Louise Hay herself made her success with this kind of bullshit, of course (strongly influenced by “researcher” Ernest Holmes, the delusional Florence Scovel Shinn and snowflake Maharishi Mahesh Yogi) most famously with “You Can Heal Your Life”, from 1984. She is a certified practitioner of “religious science”, mixing Christian fundamentalism with the flakiest ideas from oriental spiritualism, such as reiki. The central tenet of “You Can Heal Your Life” is that those who are sick have themselves to blame for it, and if they are unable to cure themselves, it is because of their psychological shortcomings (“we are each responsible for our own reality and "dis-ease"”). A standard and devious strategy for promoting woo, favored by Oprah, Chopra and others. For instance, according to Hay birth defects are a result of bad karma in a previous life.
She also claims to have cured herself of cancer through positive thinking and woo, but no one has ever been able to verify that she even ever had cancer.
Her life has even been made into a movie.
Diagnosis: Seriously deluded crackpot and peabrain who thinks religious-based intuition is on par with evidence. Her tireless promotion of stupidity, and her resources, makes her dangerous even apart from the popularity of her own inane dribblings. Her advice does actually appear to cause concrete, physical (and psychological) harm to real people.