Factors of increasing and decreasing faith from the perspective of Quran and hadiths (Verbal analysis)

Faith is the acknowledgment of the heart, which is expressed by verbal confession and the action of its effects and results. One of the most important and fundamental features of faith is the feature of increasing and decreasing it, which according to some Muslim theologians is an inherent attribute of the truth of faith, and for others it is a attribute related to deviations and excesses on the principle of faith.Those who consider the increase and decrease of faith as an intrinsic feature of faith, accept this change both in the field of elements contained in the nature of faith, and in the field of sayings and practices of faith as its deviations and consequences. The present article examines the nature of faith and the factors of its increase and decrease from the perspective of the Qur'an and hadiths with a descriptive-analytical method.These factors are examined in two types of epistemological factors and moral-behavioral factors. Epistemological factors increase faith; Certain certainty and suspicion, and in contrast, the factors that reduce faith are; Ignorance and ignorance and relying on ignorant suspicion have been introduced and then the moral-behavioral factors of increasing and decreasing faith have been studied.Examining the role of epistemological factors in faith, it is proved that in addition to theoretical certainty as well as psychological or intuitive certainty, wise suspicion can also play an important role in human belief and both increase and decrease elements for faith.