one of the early people who helped create the NEW THOUGHT movement was:

 

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Phineas Parkhurst Quimby

 

  (1802–1866) was an American mesmerist, healer, and philosopher whose teachings are widely recognized as a foundational precursor to the New Thought spiritual movement. 

Key Ideas and Contributions

Mind-Body Connection: Quimby taught that physical illness originates in the mind as a result of mistaken or "erroneous" beliefs. 
The Cure: He believed that disease could be healed by talking with the patient, correcting negative mental impressions, and aligning the mind with divine truth ("the Truth is the cure"). 
Influence on New Thought: His ideas directly influenced 19th-century metaphysical healing practices and later inspired figures like Warren Felt Evans. However, Quimby rejected organized religion and did not claim that all physical illnesses were purely mental, distinguishing his philosophy from later movements like Mary Baker Eddy's Christian Science. 

Would you like to know more about how Phineas Quimby's ideas influenced Mary Baker Eddy or the broader New Thought movement?

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  Wikipedia

  New Thought

  Higher Thought Though no direct line of transmission is traceable, many adherents to New Thought in the 19th and 20th centuries cl...

  
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  HowStuffWorks

  Phineas Parkhurst Quimby: The Mind Can Heal the Body | HowStuffWorks

  Core Concepts: Phineas Parkhurst Quimby (1802-1866) argued the mind can heal the body by correcting psychological errors, serving ...