The position of practical faculty in the human's happiness in the light of Quran

One of the aspects of human's existence that Less attention has been paid to it, is the non-cognitive aspect of the human's soul. The Islamic philosophers have expressed diffusely this faculty following of locomotive and practical faculties but havent expressed about practical faculty. This article accept important of knowledge, worth of rational faculty and citation of grasp of the good and evil of acts to theoretical faculty, believe that interpretation of non-cognitive from practical faculty is more defensible. This article, also, show with attention to verses of Quran, the practical faculty is important in the human's happiness. The role of practical faculty in achievement of faith, relationship practical faculty with moral virtues and vices, role of this faculty in actualization of justice and good act, and influence of practical faculty on theoretical or cognitive faculty are axis that verses of Quran point to them. The perfection of practical faculty necessary into final happiness of human, with attention to mentioned items, soul must attention to non-cognitive aspect, in addition to its cognitive aspectes.