Sin in Zoroastrianism, with emphasis on Pahlavi Texts

In the religion of Zoroastrianism, there is a strong coherence between the structure of cosmos and ethical assignments. The sins are like barriers hindering the establishment of divine royalty and eternity, the creators of absolute purity. Committing sin increases the power of Ahreeman (Evil). Bundahishn images the evolution of the cosmos as a struggle between a Moubad (Ohrmazd or his creation) and a frog (Evil or his creation). Sin is the only instrument by which Evil approaches His objectives. Ahura Mazda has not taken any rest since the time of creation, and in return Evil has not stopped misdeed. Evil attracts the people into Him by means of magic, intriguing them towards enmity with Ahura Mazda so that they quit Hourmazd^, s religion and shift their inclination to Evil. In Pahlavi texts sins are divided into a variety of types, out of which the most significant ones are: the sin of spirit that results in the annoyance of person^, s spirit; the sin of Hamimalan, concerning the others^, rights; and the sin of crossing the bridge. The other sins are those originated from three areas of evil thought, speech and behavior, and the sins concerned with defying religious duties by the four casts of community. In addition to the Evil and daevas who are among the main reasons of sin, noncompliance with the etiquettes of personal cleanliness, and being unconcerned about the rites of patience and death decreases the power of Ahura Mazda while increasing that of Evil. Repentance is a means of getting rid of sins according to which the doer of the sin must confess the sin in the same three areas of thought, speech and behavior, as he has committed the sin itself. Employing descriptive-analytical method, this research aims at surveying the relation of sin to Ahura Mazda and Ahreeman (Evil) according to the cosmology of  Zoroastrianism, throughout Pahlavi texts.