Co-dependence of Natural Law and Positive Law

-Positive law needs natural law in order to be law at all, in the sense that an unjust law is not a sort of law; but natural law needs positive law in order to be law at all, in the sense that law has to be applied in concrete circumstances. Positive right might be just an extension of natural right, but natural right needs to be extended  since the latter comes to us as undetermined to an indefinite number of historical circumstances, different regimes, various ways that hearts are hardened, etc.

James Chastek @ Just Thomism