“Grains, fruits, nuts, and vegetables constitute the diet chosen for us by our Creator. These foods, prepared in as simple and natural a manner as possible, are the most healthful and nourishing. They impart a strength, a power of endurance, and a vigor of intellect, that are not afforded by a more complex and stimulating diet.” Ministry of Healing (1905) p. 295-6

This quote has been confirmed through modern-day research (decades of it), and is most interestingly presented in such documentaries as Game Changers, Forks Over Knives, Eating You Alive, Plant Pure Nation and many others.