Ellen White, with a third grade education, was ahead of today's doctors: "But a short walk after a meal, with the head erect and the shoulders back, exercising moderately, is a great benefit. The mind is diverted from self to the beauties of nature. The less the attention is called to the stomach, the better. If you are in constant fear that your food will hurt you, it most assuredly will. Forget your troubles; think of something cheerful" {CTBH 101.1}. It shows that she was given more insight from God.