Spenta Mainyu, in Zoroastrianism, the Holy Spirit, created by the Wise Lord, Ahura Mazdā, to oppose the Destructive Spirit, Angra Mainyu.
Spenta Mainyu is an aspect of the Wise Lord himself. Through the Holy Spirit, Ahura Mazdā creates life and goodness. According to Zoroastrian belief, Spenta Mainyu protects and maintains many realms and creatures—the sky, water, earth, plants, and children yet to be born.