Adam Smith wrote of one of these hard-to-see body parts when describing laissez-faire
[DOC] [TLE] Smith, Adam | Internet Encyclopedia of Philosophy [PAR] The role of the free market and the laissez-faire structures that support it are but 
two ... His first book, The Theory of Moral Sentiments, sought to describe the 
natural ... How these two books fit together is both one of the most controversial 
subjects ...