MH page 305

Food should not be eaten very hot or very cold. If food is cold, the vital force of the stomach is drawn upon in order to warm it before digestion can take place. Cold drinks are injurious for the same reason; while the free use of hot drinks is debilitating. In fact, the more liquid there is taken with the meals, the more difficult it is for the food to digest; for the liquid must be absorbed before digestion can begin. Do not eat largely of salt, avoid the use of pickles and spiced foods, eat an abundance of fruit, and the irritation that calls for so much drink at mealtime will largely disappear.

Moderate food temperatures, minimal mealtime liquids, and simple seasonings promote healthy digestion. The paragraph makes multiple empirical assertions regarding temperature, liquids, salt, and spices in relation to digestion.

Food should be eaten slowly and should be thoroughly masticated. This is necessary in order that the saliva may be properly mixed with the food and the digestive fluids be called into action.

Eating slowly and chewing thoroughly are necessary for proper digestion. The text asserts a direct physiological requirement for mastication and salivary mixing.

Another serious evil is eating at improper times, as after violent or excessive exercise, when one is much exhausted or heated. Immediately after eating there is a strong draft upon the nervous energies; and when mind or body is heavily taxed just before or just after eating, digestion is hindered. When one is excited, anxious, or hurried, it is better not to eat until rest or relief is found.

Avoid eating during exhaustion, excessive exercise, excitement, or anxiety to protect digestion. The paragraph makes empirical claims about nervous energy distribution and digestion during physical or emotional stress.