One cannot measure or describe the power of Siddhas (holy saints). They are equivalent to Lord Shiva. They are capable of influencing any life form. Maha Rishis created sacred Gayathri chants for all forces (of nature) using their meditative power and passed it on to their disciples while Sages performed yagnas to bind these forces. But the Siddhas could not be bound in any category unlike others. The Siddhas have attained the highest possible proficiency in the areas of alchemy (known as Vaadhavitthai in Tamil), mantric arts, natural medicine and control of nature’s force (known as Paragnanayogam in Tamil). Alchemy is the art of binding various forces into a ball by combining several metals and herbs. The Siddhas are capable of purifying various metals by using certain herbal extracts and transform the same into gold. They don’t use this gold for commercial purposes; rather, they are believed to use it in the form of powder to cure diseases of mankind.