What is Siddha?
According to Tamil literature, Siddham means mind. Siddha means achievements with perfection. Those who attained an intellectual level of perfection were called as Siddhars . Most of the diseases are related to mind. The primitive cause of the disease is the variation and disturbance in mind. Thus, we have to treat the mind to cure the physical problem. So Siddhars stressed the value of leading calm, peaceful life with the help of yoga, pranayama etc. By this fact, one can understand that Siddha not only deals with the physical illness, but also with the mental illness.