Chapter X · LOWER COST SUPERIOR MERIT
Reading edition
"An idea of itself may be good, but still not of itself be of any value."
Patents, to meet with even moderate commercial success, must be on a "human necessity" or "luxury"—must cost less and be better than the ones already on the market. That is this whole chapter in a nutshell. Lines upon lines could be said about it, but the reader will grasp the point.