The use of objects of real or supposed value for currency, as gold, jewellery, etc., is barbarous; and it always expresses either the measure of the distrust in the society of its own government, or the proportion of distrustful or barbarous nations with whom it has to deal. A metal not easily corroded or imitated, is a desirable medium of currency for the sake of cleanliness and convenience, but were it possible to prevent forgery, the more worthless the metal itself, the better. The use of worthless media, unrestrained by the use of valuable media, has always hitherto involved, and is therefore supposed to involve necessarily, unlimited, or at least improperly extended, issue; but we might as well suppose that a man must necessarily issue unlimited promises because his words cost nothing. Intercourse with foreign nations must, indeed, for ages yet to come, at the world's present rate of progress, be carried on by valuable currencies; but such transactions are nothing more than forms of barter. The gold used at present as a currency is not, in point of fact, currency at all, but the real property[24] which the currency gives claim to, stamped to measure its quantity, and mingling with the real currency occasionally by barter. [24] Or rather, equivalent, to such real property, because everybody has been accustomed to look upon it as valuable: and therefore everybody is willing to give labour or goods for it. But real property does ultimately consist only in things that nourish body or mind; gold would be useless to us if we could not get mutton or books for it. Ultimately all commercial mistakes and embarrassments result from people expecting to get goods without working for them, or wasting them after they have got them. A nation which labours, and takes care of the fruits of labour, would be rich and happy; though there were no gold in the universe. A nation which is idle, and wastes the produce of what work it does, would be poor and miserable, though all its mountains were of gold, and had glens filled with diamonds instead of glacier.