Many answers are possible. Grammar alone can give precision and clarity to language, and language was seen in India as central to knowledge. Language is also the vehicle of sacred mantras (in the Vedas, for instance), intellectual texts, debates, inquiries, none of which are possible without elaborate grammar, which explains the very high importance attached to grammatical tradition in India, not only in Sanskrit but in every classical language, and the important contributions from a number of great scholars, beginning with Pāṇini.