1. VADHAM (ALCHEMY)
2. AITHIYAM (MEDICINE)
3. YOGAM (YOGA)
4. GNANAM or THATHUVAM (PHILOSOPHY)
Siddhars, spiritual scientists of Tamil Nadu explored and explained the reality of Nature and its relationship to man by their yogic awareness
and experimental findings. They postulated the concept of spiritualism for self improvement and the practices propounded by them came to be known as the "SIDDHA SYSTEM".
The eight mighty SIDDHIC PROCESS or OCTOMIRACLE ("ATTA-MA-SIDDHI") which could keep the body strong and perfect for EXTERNAL LIFE, where THERE IS NO DEATH OR REBIRTH.