David Ricardo

"The security of labour's earnings is as important as the security of capital's returns."

"Market price gravitates toward natural price through the action of competition."

"The expansion of trade promotes the advancement of civilization and human happiness."

"Capital may be unproductive if invested in unfruitful endeavours."

"The growth of population must be accompanied by growth in productive capacity."

"Economic laws are as immutable as the laws of nature itself."

"True wealth lies not in the possession of money, but in the command of commodities."