چکیده (انگلیسی):

ABSTRACT: One part of every nation’s culture, mores and manners derives from its beliefs and thoughts. The
culture of different nations and their promotion in various subjects has a direct relation with their religion. Iranian
culture was a phenomenon of the power of humanistic religions like Zoroastrianism but as a fault of clergymen at
the end of Sasanian dynasty had lost its positive influence. Islam, as the most perfect divine religion did not reject
the morals of previous religions. Moreover, thoughtful Iranians had a great role in various branches of science,
translation and compilation and even in forming many religious sects and the growth and developing of Islamic
mysticism. It leads to the great dominance of Persian language in to Arabic, especially in subjects that were related
to religion like worships and prays. Arabs were influenced by Iranians by means of religion specially the cult of Shia.
It is obvious that Iranians were interested in saints of Shia because it had a close relation with their historical
thoughts and principle beliefs.
Keywords: Religion, Earliest phase of Islam, Iran, Arabs, Islamic science