Thought To Ponder
He generally, indeed, neither intends to promote the public interest, nor knows how much he is promoting it. . .; and by directing that industry in such a manner as its product may be of the greatest value, he intends only his own gain, and he is in this, and many other cases, led by an invisible hand to promote an end which was no part of his intention. Nor is it worse for society that it was no part of it. By pursuing his own interest he frequently promotes that of society more effectually than when he really intends to promote it.
Adam Smith
