Cognitive linguistics says that humans are deprived of the ability to think without conceptual metaphor. Using conceptual metaphor, one can know more deeply about the thoughts of language users. Given the way humans think, they need material examples to express spiritual and abstract concepts. Being a means of conveying the states of mystics at some point in time, Persian literature has employed material fields of words to conceptualize most of these states. One of the spiritual matters is “fanā”, which has been conceptualized through the objective domain of “war”. Mysticism has often been described as warfare in Persian literature. It can be said that war and bloodshed in the epic genre have somewhat been reflected in the mystical genre and have become a literary tradition in Persian poetry particularly during the Islamic Era, displaying lasting mystical concepts. To grasp some metaphysical concepts in mysticism would be easier through conceptual metaphors such as “love is war”. The current study thus aims to answer the question of how this metaphor has been formed in the sonnets of Rumi and to what extent has this conceptualization been influenced by the cognitive mechanism of the Qur'an. Thus, having extracted conceptual micro-metaphors from Diwan-e-Shams, matching the findings with ayahs and content analysis, the study provided an answer to the above-mentioned question, taking a "contemporary metaphor theory" approach. The analysis of the metaphor “love is war” showed that this very central metaphor confirms the micro-metaphor that “love is fanā (joining)”. The corpus of this study consisted of a hundred and ten sonnets from Diwan-e Shams and Medinan surahs. The findings indicate that removing this metaphor from Persian poetry (especially in the style of Iraq), will result in shallow mystical texts.