Ravidas In the "Adi Granth", forty of Ravidas's poems are included, and he is one of thirty six contributors to this foremost canonical scripture of Sikhism. This compilation of poetry in Adi Granth responds to, among other things, issues of dealing with conflict and tyranny, war and resolution, and willingness to dedicate one's life to the right cause. Ravidas's poetry covers topics such as the definition of a just state where there are no second or third class unequal citizens, the need for dispassion, and who is a real Yogi. Jeffrey Ebbesen notes that, just like other bhakti sant-poets of India
Adi Shankara ("Bhāṣya"), original philosophical expositions ("Prakaraṇa grantha") and poetry ("Stotra"). However most of these are not authentic works of Adi Shankara and are likely to be works of his admirers or scholars whose name was also Shankaracharya. Piantelli has published a complete list of works attributed to Adi Sankara, along with issues of authenticity for most. Adi Shankara is most known for his systematic reviews and commentaries ("Bhasyas") on ancient Indian texts. Shankara's masterpiece of commentary is the "Brahmasutrabhasya" (literally, commentary on Brahma Sutra), a fundamental text of the Vedanta school of Hinduism. His commentaries on ten Mukhya (principal) Upanishads are