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 PettyRaising of money may indeed change the species, but with so much loss as the foreign pieces were raised unto, above their intrinsick value.
William PettyAn house is of a double nature, viz., one, wherein it is a way and means of expence, the other as it is an instrument and tool of gain.
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 PettyWithout the knowledge of the true number of the people, as a principle, the whole scope and use of keeping bills of birth and burials is impaired; wherefore by laborious conjectures and calculations to deduce the number of people from the births and burials, may be ingenious, but very preposterous.
William Petty