The human body is viewed as a multivariable control system, with the brain as the supervisory controller. The five physical senses act as feed forward signals to the controller. It is shown that this system can obey the law of similars if the sensory organs exhibit a positive semi-sigmoidal or an exponential dose-response curve. Under this new light we see that most alternate therapies like the Homeopathy, Chromo therapy, Music therapy, Aroma therapy and Acu-therapies (puncture, pressure and touch) are but various special cases of a more general curing mode, namely the feed-forward compensation. It is also pointed out that the oldest medical systems of Siddha andAyurveda use this principle as one of the modes of treatment.

Keywords: MIMO system, Feed Forward Compensation, Cybernetics, Law of  Similars, Homeopathy, Siddha, Ayurveda, Hormesis.