The importation of gold and silver is not the principal, much less the sole benefit which a nation derives from its foreign trade.
Adam SmithIt is the natural effect of improvement, however, to diminish gradually the real price of almost all manufactures.
Adam SmithIt is not the actual greatness of national wealth, but its continual increase, which occasions a rise in the wages of labour. It is not, accordingly, in the richest countries, but in the most thriving, or in those which are growing rich the fastest, that the wages of labour are highest. England is certainly, in the present times, a much richer country than any part of North America. The wages of labour, however, are much higher in North America than in any part of England.
Adam SmithEvery individual necessarily labors to render the annual revenue of society as great as he can. He generally neither intends to promote the public interest, nor knows how much he is promoting it. He intends only his own gain, and he is, in this, as in many other cases, led by an invisible hand to promote an end which was not part of his intention.
Adam Smith