Sentence:  ...the government must be a weak one indeed, if it should forget that the <WSD>good</WSD> of the whole can only be promoted by advancing the <WSD>good</WSD> of each of the parts or members which compose the whole. 
Meaning of the word marked with <WSD> tags:  The abstract instantiation of goodness; that which possesses desirable qualities, promotes success, welfare, or happiness, is serviceable, fit, excellent, kind, benevolent, etc.