According to the revelation of the origin of Agathiyar's temple by Dr VM Jayapalan, a morsel of food fed by the old man together with the chanting of Agathiyar's name removed all the karma and Asuric nature of the Asura king. That was in time immemorial.
Later the most compassionate masters and Siddhas approached Erai and requested that they be given the gift to help man out of his misery and to guide man back to Erai's abode. From Velayutham Karthikeyan Aiya's posting in his blog SITHTHAN ARUL at http://siththanarul.blogspot.com we understand the compassion of the Siddhas towards humanity. Karthiyen Aiya’s blog entry brings us back to time immemorial where the Siddhas, being compassionate and kind, put forward to the Erai, their wish to guide and save humanity. The Siddhas had wished that whoever seek them out for solutions to their problems and surrendered to them, he shall be pardoned for his past deeds, however bad and evil they may be. The Siddhas asked that man shall not be put through the trial and tribulations and made to face the consequences of his actions but instead will be saved. Erai granted the Siddhas their wish.
After the audience with Erai, the next instant the Siddhas wrote down; the reasons for each individual’s sufferings; listed out solutions and remedies; wrote down ways and means to overcome or end the seeker's problems, sins, diseases, illnesses and sufferings. They wrote them in Tamil prose on dried palm leaves. This writings came to be known as the Nadi. Hence the Nadi came to be written for every individual.
Agathiyar in my Nadi mentions that all karma dissolves by performing the yagam or homam. Besides speaking through the Nadi, the Siddhas have made many appearances to devotees, helping them in their times of need.
Simply said coming to the worship of Siddhas helps to break the chain of karma. The Gnana Thiravukol or key is provided by the Siddhas.
Agathiyar in my Nadi mentions that all karma dissolves by performing the yagam or homam. Besides speaking through the Nadi, the Siddhas have made many appearances to devotees, helping them in their times of need.
Simply said coming to the worship of Siddhas helps to break the chain of karma. The Gnana Thiravukol or key is provided by the Siddhas.