Most of the printed editions have 660 verses, except one, which has 663.[1] In Kāvyādarśa, Daṇḍin argued that a poem's beauty derived from its use of rhetorical devices – of which he distinguished thirty-six types. He was the main proponent of gunaprasthana, the view that poetry needed qualities or virtues such as shleshha (punning), prasaada (favour), samataa (sameness), maadhurya (beauty), arthavyakti (interpretation), and ojah (vigour). Poetry consisted in the presence of one of these qualities or a combination of them.