sūtrātman

“Sutratma (devanāgarī: सूत्रात्मन् sūtrātman) is a Sanskrit word composed by sūtra (“thread”) and ātman (“self”), usually translated as the “thread-soul”

H.P. Blavatsky defined it as follows:

Sûtrâtman (Sk.). Lit., “the thread of spirit”; the immortal Ego, the Individuality which incarnates in men one life after the other, and upon which are strung, like beads on a string, his countless Personalities. The universal life-supporting air, Samashti prau; universal energy.”