Ancient Iranian Reason- Based lights in Shahnameh and Arabic Sources

The reason- based approaches originate from Iranian, cultural thoughts; because the same culture has approved reason as the cause of human's internal devils such as angry, ambition, envy.The same view abounded in Shahnameh Ferdowsi's shows the good deeds and their fine effects, he has appreciated them comparing with bad deeds.Hence, Ferdowsi has gave superior to God's worship than his messenger worship, on the contrary to knowledge- worship, there is no condition for knowledge-worship. In shahnameh, there are so many thoughtful sayings which Ferdowsi has narrated them by wisdom, wise man, or Iran's wisdom. It is important to notice Arabic sources abounding with Iranian sayings. It has been approved that most of these sayings originated from Iranian scientists.