He was 13th century philosopher who contributed to the development of Shaiva Siddhanta School. His literary work ‘Siva Jnana Bodham’ in Tamil is the basis on Saiva Siddhanta thought.
It was religious philosophy that originated in Tamil Nadu during Imperial Chola dynasty where Shiva is worshipped as supreme deity.
Fourteen texts collectively called Saiva Siddhanta Sastram, form the core philosophy of Saiva Siddhanta.
It is a dualistic philosophy based on the idea of pati-pashu-pasha. Shiva (pati) being the lord and souls/individuals (pashu) are eternally distinct, divine entities. The rest of universe i.e., soul’s bondage (pasa/pasha) is also real but inanimate. Acts of service, good conduct, worship and spiritual discipline makes pashu earn grace of pati and helps him free from bondages.
Earlier foundation of Shaivism was based on 28 Agamas. However, Southern Saiva Siddhanta developed on its own independent path.