Visperad

The Visperad is not read or recited independently. It exists to expand the Yasna at the great seasonal festivals of the Zoroastrian calendar, the gahambars, and at a handful of other high occasions, and its own structure only makes sense laid over the Yasna it accompanies. Its name comes from vispe ratavo, all the masters, and its content is mostly invocation: it addresses a wide roster of ritual authorities and sacred categories that the plain Yasna does not name individually.

In practice a priest performing an expanded ceremony inserts the Visperad's twenty three karde, or sections, at fixed points within the Yasna's own sequence rather than reciting the two texts one after another. The result is a single combined liturgy in which the Visperad thickens the invocatory sections without altering the Yasna's core structure, including the Gathas embedded within it. Because it has almost no independent narrative or doctrinal content of its own, the Visperad is best understood as a set of insertions rather than as a companion scripture, and its interest to a reader depends on already knowing the Yasna it exists to extend.

The gahambars themselves mark the six seasonal creations Zoroastrian cosmology recognizes, sky, water, earth, plants, animals and humanity, so an expanded Visperad ceremony is tied to specific points in the agricultural and pastoral year rather than performed on an arbitrary schedule.

Like the rest of the Avesta, the Visperad survives in Younger Avestan, the later stage of the language shared with most of the Yashts and the Vendidad, and philologists treat its composition as later than the Gathic core of the Yasna. Its content, built almost entirely from invocation formulas rather than narrative or ethical teaching, has made it a lower priority for translators and popular commentary than the Gathas or the more vivid material in the Yashts, and it is correspondingly less discussed outside specialist Avestan studies.

Its transmission follows the same path as the rest of the Avesta: oral recitation by a trained priesthood for a very long period before the Sasanian era alphabet fixed a written form, and a Pahlavi Zand that later priests used as a teaching aid once Avestan had ceased to be understood without study. Because the Visperad only functions in company with the Yasna, manuscripts typically transmit the two together as a combined liturgical unit rather than as separate books, which is also how the ceremony itself treats them.

The Zend-Avesta translation prepared by L. H. Mills for the Sacred Books of the East series in the late nineteenth century remains one of the standard points of reference in English for readers without access to Avestan, though later Avestan philology has revised parts of his interpretation.