Jothidam, or astrology, is India's ancient social institution which relies heavily on the power of language. It is also frequently known as a word-profession, since the experts practice the art of spoken words to foretell and advise. Astrologers are consulted by numerous individuals in India at numerous life stages, and there are some who take their advice seriously with a lot of faith.

Nadi Jothidam has its base in a traditional belief that the individual can predict past, present and future by using the written content on palm leaves commonly referred to as Nadi leaves.Palm leaves are dried and cured with special herbs and are available in different sizes. A group of siddhas known as enlightened masters wrote the leaves with tiny handwritten notes thousands of years ago. Accuracy of nadi jothidam is dependent on proper identification of the leaf.

Nadi Jothidam is a specialized form of astrology that astonishes most visitors. When one visits a Nadi astrologer, the client typically provides only their thumb impression. From that, the astrologer identifies a specific ancient palm leaf manuscript that has personal details: the client's name, parents' names, spouse's name, children's details, birth date and time, professional information, and significant past events all with remarkable accuracy.

Vaitheeswaran Koil, a holy temple in Tamil Nadu, is renowned for the very old palm leaf astrology, Nadi Jothidam. This temple is said to have healed injured Lord Shiva after a battle. It is a Navagraha temple as well, where Mars got treated for leprosy by Vaidyanatha Swamy. Nadi Jothidam readings, according to very old scriptures, tell us about the past, present, and future. Agasthiyar, a renowned sage, wrote this methodology, utilizing his yogic powers to foresee the future of mankind. The leaves, which were initially kept at Tanjore Saraswati Mahal, were sold during the British period but have now been recovered by astrologer ancestors and families.