The significant role of moral values and moral commitments in human life is neglected neither by philosophers nor by psychologists. One of considerable points regarding the role and function of moral value concerns psychological function and achievement. This paper deals with the psychological role and function fulfilled by moral commitment. According to religious teachings psychological aspect of human life has connection with moral commitment. The writer attempts to explain how moral values and commitment could be related to psychological health. The discussion is confined to general understanding of moral values in all world religions but mostly the references are limited to Islamic teachings.