Nothing can be more idle than the opposition of theory to practice! - Jean-Baptiste Say

Some writers maintain arithmetic to be only the only sure guide in political economy; for my part, I see so many detestable systems built upon arithmetical statements, that I am rather inclined to regard that science as the instrument of national calamity.

It is a melancholy but an undoubted fact, that, even in the most thriving countries, part of the population annually dies of mere want. Not that all who perish from want absolutely die of hunger; though this calamity is of more frequent occurrence than is generally supposed.

The wants of mankind are supplied and satisfied out of the gross values produced and created, and not out of the net values only.