'Jivasya tattva-jijnasa' (SB 1.2.10).
Jiva (the living being)
जीव
The jiva is the soul as wanderer in transmigration: the conscious witness that, bound by karma, cycles through birth and death until self-realization frees it; the jiva-Brahman relation is the central theme of Vedanta. In the processed verses its true calling is 'inquiry into reality' — 'jivasya tattva-jijnasa' (SB 1.2.10); and when the Lord is seen within the self, its heart-knot is cut, its doubts severed, its karmas dissolved (1.2.21).
Śrīmad Bhāgavata Mahāpurāṇa 1.2.10 — Sanskrit Wikisource (pinned oldid=110173)
SB 1.3.32 refers to the beyond-unmanifest as 'sa jivo yat punar-bhavah'; commentaries differ (jiva vs mula-avyakta) — wording kept textual.