Postmodern ethical thought is not in line with Islamic spiritual ethics as modernism and postmodernism are Western ideas that have no place in Islam. This library study briefly elaborates the history of ethical development in the Islamic world and the spiritual ethics from the Islamic perspective. It also surveys the thought of postmodernism as well as postmodernism and religion as they need some deliberation for the interrelation between religion and ethics. As far as spiritual ethical thoughts are concerned, a discourse of the postmodernist ethical thought is given an emphasis to comprehend the ethical thought of postmodern supporters. An understanding of the ethos draws us to a conclusion that reconciliation between postmodernist ethical thought and Islamic spiritual ethics is impossible.