Horish Johari said in the preface to Ancient Indian Massage, "As food is a necessity for the organism from birth to death, so is massage to the human organism. Food provides nourishment from external sources to the organism, whereas massage excites the internal resources and provides nourishment in the form of proteins, glucose, and other vitalizing chemicals, which are within the system. Massage, like a mother, preserves the body energy and saves the organism from decay. It also works as a cleanser and helps the organism in discharging toxins out of the body, thus rejuvenating the body."
In other words, Massage, like food, is essential for maintaining balance within the body.