Suutra 1: athaato brahma-jijñaasaa
Without sandhi: atha; ataH; brahma-jijñaasaa Swami Sivananda's translation: Now, therefore, the enquiry into Brahman. Glossary: atha & athA adv. then, now; therefore, accordingly; further, also; [[&]] however, but (often merely expletive). At the beginning of books or sections of books = now atas (~ataH) adv. hence, afterwards, then, from now (ñ {Urdhvam & param}); therefore, consequently. Also = abl. of 1 {a}. jijñAsana (= jijñAsA) n. desire of knowing , investigation Katha1s.v , 136.