The current research analyzes Knowledge of reason and its functions in the field of theology play a significant role in deep understanding of religious and human beliefs.
Any lack of such understanding of this category and its plans, it causes many deviations and damages in human thought.
In this research work, looking at the opinions and thoughts of two great philosophers; Mulla Sadra and Imam Khomeini.
We here first have had a glance at the definition of reason and discussed about its nature and divisions. In the following, the relationship between reason and religion and their possible conflicts or contradictions have been examined
And finally, according to the opinions of these two philosophers, the answers to these conflicts have been sorted out and given for readers.