Check out Byron Katie and her work

"The Work of Byron Katie is a way of identifying and questioning the thoughts that cause all the anger, fear, depression, addiction, and violence in the world. Experience the happiness of undoing those thoughts through The Work, and allow your mind to return to its true, awakened, peaceful, creative nature."

"Byron Kathleen Mitchell, better known as Byron Katie (born December 6, 1942[1]), is an American speaker and author who teaches a method of self-inquiry known as "The Work of Byron Katie" or simply as "The Work". She is married to the writer and translator Stephen Mitchell. She is the founder of Byron Katie International (BKI), an organization that includes The School for the Work and Turnaround House in Ojai, California."

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Check out Byron Katie and her work