By Swami Harshananda
Among all the philosophical systems, the Advaita Vedānta of Sankara and his followers can boast of the maximum number of written works. One of the writers in this line who has done yeomen service by writing sub-commentaries on all the major works of Śaṅkara is Ānanda-jñāna, celebrated as Anandagiri, who lived in the 14th cent. A. D.
Known as Janārdana in his pre-monastic life, he was the son of one Suryanārāyaṇa and belonged to the country called Cera (now in Tamil Nadu). He was probably a devotee of Viṣṇu. His guru was Suddhānanda. His ṭīkā (comment) on the Brhadāranyaka Vārttika of Sureśvara (7th-8th cent. A.D.) has been highly appreciated. In his original polemical work Vedānta-tarka- sañgraha he has refuted the Vaiśeṣika categories like dravya, guṇa etc.
In his conclusions he has tried to follow his predecessors like Anandabodha (11th cent. A. D.) and others. He holds that avidyā or ajñāna is an indeterminable false entity stuff of this world. Ajñāna is one only and is supported by Brahman.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore