Moral virtue has two dimensions: cognitive and motivational. The cognitive dimension shows value and perfection of virtue; and the motivational dimension is the internal tendency of the person to do a certain action or express a certain emotion. Faith is based on two things: cognition and wholehearted submission towards Allah with His existential and moral characteristics.The present article deals with the effect of faith on these two dimensions of moral virtue. Faith affects the cognitive dimension of virtues from two aspects. On the one hand, faithful cognition of Allah, human being and the purposefulness of the creation introduce the virtues as valuable and perfect truths. On the other hand, heartfelt submission in faith is the main factor in understanding the cognitive dimension of virtues. The role of faith in creating the motivational dimension of virtues is a fundamental role. Besides, due to distinction of the person’s tendencies from the goal of faith, and the faith’s relation to the moral Allah, a believer’s tendencies will be towards moral virtues. In addition, faith causes the moral virtues to become sacred. Accordingly, the person’s willingness to realize the motivational dimension of virtues is amplified. Due to various ranks in faith, the above effects on dimensions of virtues are of various ranks. At the end, we have briefly listed the implications of faith in a religious approach to biomedical ethics compared to a secular biomedical ethics.