scripture has ritual uses aimed at giving religion meaning in daily life. in zoroastrianism, the niya¯yišns, ‘invocations of praise’, and the yašts, ‘devotional poems’ have played fundamental roles in connecting doctrine and theology to praxis and conviction whereby faith and rites have been transmitted and augmented across many generations. this article discusses some of the contents and traditions of each niya¯yišn and yašt plus the functions those religious texts have fulfilled and continue to serve for zoroastrians from ancient through modern times.