During many centuries, "Natural Law" doctrine has been interpreted in different ways; so there have been propounded various theories which trace back to the ancient Greek age, and which today play a central role in the domains of social sciences. One theory as regards the natural law is Aquinas's theory of natural law; and a recent popular explication of Aquinas's position is John Finnis's interpretation. According to Finnis, an action is wise only when it is done to gain: one of the basic goods. These goods, on Finnis's view, are: life, knowledge, skilled performance, play, friendship, marriage, practical reasonableness, and religion. Each: of these goods is self-evident, intrinsic, independent of each other, having equal value, and non-based on facts. The essay firstly explains Finnis's natural- law theory; and then, based on the doctrines of Islamic Transcendent Theosophy, it offers a criticism of Finnis's theory.