If a situation requires sudden thought and action, the blood is promptly driven

If a situation requires sudden thought and action, the blood is promptly driven to the head. If a heavy meal is to be digested, the greater portion of the blood leaves the head, centering around the digestive organs. The Ego concentrates its efforts on ridding the body of the useless food. Therefore a man cannot think well after a heavy meal.
– Max Heindel –