It is certain, that we must either, together with the commercial arts, suffer their fruits to be enjoyed, and even in some measure admired; or, like the Spartans, prohibit the art itself, while we are afraid of its consequences, or while we think that the conveniencies it brings exceed what nature requires. But we may propose to stop the advancement of arts at any stage of their progress, and still incur the censure of luxury from those who are not advanced so far. The housebuilder and the carpenter at Sparta were limited to the use of the axe and the saw; but a Spartan cottage might have passed for a palace in Thrace: and if the dispute were to turn on the knowledge of what is physically necessary to the preservation of human life, as the standard of what is morally lawful, the faculties of physic, as well as of morality, would probably divide on the subject, and leave every individual, as at present, to find some rule for himself. The casuist, for the most part, considers the practice of his own age and condition as a standard for mankind. If in one age or condition he condemn the use of a coach, in another he would have no less censured the wearing of shoes; and the very person who exclaims against the first, would probably not have spared the second, if it had not been already familiar in ages before his own. A censor born in a cottage, and accustomed to sleep upon straw, does not propose that men should return to the woods and the caves for shelter; he admits the reasonableness and the utility of what is already familiar; and apprehends an excess and corruption, only in the newest refinement of the rising generation. The clergy of Europe have preached successively against every new fashion, and every innovation in dress. The modes of youth are a subject of censure to the old; and modes of the last age, in their turn, a matter of ridicule to the flippant, and the young. Of this there is not always a better account to be given, than that the old are disposed to be severe, and the young to be merry. The argument against many of the conveniencies of life, drawn from the mere consideration of their not being necessary, was equally proper in the mouth of the savage, who dissuaded from the first applications of industry, as it is in that of the moralist, who insists on the vanity of the last. "Our ancestors," he might say, "found their dwelling under this rock; they gathered their food in the forest; they allayed their thirst from the fountain; and they were clothed in the spoils of the beast they had slain. Why should we indulge a false delicacy, or require from the earth fruits which she is not accustomed to yield? The bow of our father is already too strong for our arms; and the wild beast begins to lord it in the woods."