The Mayo Clinic Gets It

Positive self-image is important. Negative self-talk has a very real effect on health! Did you know that positive self-talk helps manage stress, increase your life expectancy, and lower depression. Here is some research from the Mayo Clinic about how important positive self-talk is.

It's unclear why people who engage in positive thinking experience these health benefits. One theory is that having a positive outlook enables you to cope better with stressful situations, which reduces the harmful health effects of stress on your body.

https://www.mayoclinic.org/healthy-lifestyle/stress-management/in-depth/positive-thinking/art-20043950