The method I take to do this is not yet very usual; for instead of using only comparative and superlative Words, and intellectual Arguments, I have taken the course (as a Specimen of the Political Arithmetic I have long aimed at) to express myself in Terms of Number, Weight, or Measure; to use only Arguments of Sense, and to consider only such Causes, as have visible Foundations in Nature.
William PettyNo man pays double or twice for the same thing, forasmuch as nothing can be spent but once.
William PettyI hope no man takes what I said about the living and dieing of men for mathematical demonstration.
William PettyThat some are poorer than others, ever was and ever will be: And that many are naturally querulous and envious, is an Evil as old as the World.
William Petty