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 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 PettyCauses of Civil War are also, that the Wealth of the Nation is in too few mens hands, and that no certain means are provided to keep all men from a necessity either to beg, or steal, or be Souldiers.
William PettyWherefore the race being not to the swift, etc. but time and chance happening to all men, I leave the Judgement of the whole to the Candid, of whose correction I shall never be impatient.
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