Chapter CVIII: Section CVII: Equilibrium Of Prices

Goods whose cost of reproduction,(641) that is, the highest necessary cost of reproduction is the same, have uniformly the same value in exchange. Every deviation from this level immediately sets forces in motion which endeavor to restore the level, just as the water of the sea seeks its level, notwithstanding the mountains and abysses which the winds bring forth from its bosom.(642)(643)