A great good man, means a man who is both great and good.
 Adam Smith, The Theory of Moral Sentiments (1759). copy citation

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Author Adam Smith
Source The Theory of Moral Sentiments
Topic meaning good
Date 1759
Language English
Reference
Note
Weblink https://en.wikisource.org/wiki/The_Theory_of_Moral_Sentiments

Context

“In general, no quality, when considered in concrete, or as qualifying some particular subject, can itself be conceived as the subject of any other quality; though when considered in abstract it may. No adjective therefore can qualify any other adjective. A great good man, means a man who is both great and good. Both the adjectives qualify the substantive; they do not qualify one another. On the other hand, when we say, the great goodness of the man, the word goodness denoting a quality considered in abstract, which may itself be the subject of other qualities, is upon that account capable of being qualified by the word great.” source