The Role of Beliefs and Emotions on Health and Sickness and the Perfection of Prophetic Guidance Shaykh ibn al-ʿUthaymīn (رحمه الله) said: "Emotions have a great effect on weakening a person. So sometimes the healthy person might think he is ill and thus becomes ill. And sometimes a person ignores illness while he is ill and he becomes healthy. Thus, the soul being emotionally affected by something has a far-reaching effect." Read full article: https://abuiyaad.com/w/nocebo-effect