Despite significant medical advances over the past two centuries, the COVID-19 pandemic exposed systemic vulnerabilities in healthcare systems, prompting individuals to seek holistic and personalized health approaches. This shift renewed interest in New Thought principles that emphasize the mind’s role in health and self-healing. However, while offering valuable insights, this perspective can oversimplify health issues, leading to self-blame and neglect of essential medical care. This book explores the New Thought movement’s history and its implications in healthcare, detailing its origins from Gnostic ideas to the influence of Rhonda Byrne’s The Secret. Subsequent chapters assess both the beneficial applications, like the placebo effect and positive psychology, and the detrimental aspects, including victim-blaming and the rationalization of systemic injustices.