Referring briefly to various philosophical and ethical views of human knowledge and action and to the view of the holy Quran in the field, this paper has agreed with the gap between knowledge and faith, and, relying on the theory of faith, has tried to solve the problem. In this view, an epistemic element can be found in faith by which one may attain a double knowledge in action. It is just the same element lacking in knowledge - based theories. To attain a full proposal for solving the problem with regard to faith, regarding the effect of material agent in human action and deed, the role of final goal in it and noticing degrative state of faith and its degrees must be counted as the foundations.