This is a crucial aspect of Zoroastrianism: man is invited to follow the path of the Lord, but he is free in that choice – he is not a slave or a servant.99 Ahura Mazda was also the father of a set of twins, Spenta Mainyu, the Good Spirit, and Angra Mainyu, the Destroying Spirit. These twins respectively choose Asha, justice, and Druj, deceit.100
