" Nevertheless, if someone has an empty brain—and because of this is vexed by insanity, and is delerious—take the whole grains of wheat and cook them in water. Remove these cooked grains from the water, and place them around his whole head, tying a cloth over them. His brain will be reinvigorated by their vital fluid, and he may recover his health and strength. Do this until he returns to his right mind. If "

― Hildegard von Bingen , Hildegard von Bingen's Physica: The Complete English Translation of Her Classic Work on Health and Healing