Siddhars through their Great powers like Attamasiddhikal and through immense prayers realised the fact that Soul is ultimately a part of the Supreme which is like a drop of water from sea. "Siddharkal entral Sivalokam inge darsithor"
The Kundalini or the serpent power passes through each aatharam during the practice of yoga. During each stage of yoga , the kundalini reaches a particular aatharam and slowly arises finally reaching Sahasratharam.
Temperament of a person acquires his or her natural character of body on the basis of three humours - Vatham, Pitham and Kapham. This is because the anatomical and physiological components of the body is constituted by these three humours.
The great Siddhar Theraiyar lays emphasis on the primary causes of disease in human body. He stresses on the three humours which are the basic reason in one or other way for the causation of Pini or (noi) disease.
Karpa medicine, as discussed earlier ,if taken after purification ,with proper dose and regimen will produce the best result. According to different Sidddhars, Kalpa medicine and the method of its preparation differs.
Kayakarpam is the process of rejuvenation. Rejuvenation helps to prolong life of human beings and prevent ageing, greying of hair, wrinkling and even death. This is well explained in the precious writings of "Thirumanthiram".
The history of Native Indian Medical Sciences had originated back to 3000 BC. The excavations done in the Sindhu Valley of Mohenjadaro and Harappa reveals an advanced system of hygiene and existence of Pre-Aryan and Pre-Vedic culture or civilization.
"Agasthiyar Ratna Surukkam" explains that total number of diseases according to Siddham or Siddha Medicine is 4448. Hence there may be different criteria in which diseases are classified. One of the factors the three humour derrangement.
According to the quotes of Kannusamiyam, the significance of Siddha Literature is very well explained and expressed in a spiritual aspect. The one who understands this, achieves his aim and shine in life and the one who doesn't can never succeed.