Another means of keeping the body free from disease is development of immunity. When the immunity is strong, the disease-producing microbes cannot harm the body. Even when some of them succeed in entering the body, they fail to colonise and are destroyed. Anybody, having strong immunity and resistance power, even if attacked by bacteria or virus, does not fall a prey to their depressions because an immunized body stays healthy. Perception of body enhances the immunizing capacity of the practitioner and fortifies him against the vicious attack of the enemy.