invisible hand

By preferring the ſupport of domeſtick to that of foreign induſtry he intends only his own ſecurity; and by directing that induſtry in ſuch a manner as its produce may be of the greateſt value, 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 no part of his intention.