《商君书·算地》
古代神农教会人们耕田而成为天下帝王，这是因为人们要学习他的智慧。商汤和周武王创造了强大的军队而征服一天下诸侯，这是因为诸侯们屈服于他们的强力。
故神农教耕而王天下，师其知也；汤、武致强而征诸侯，服其力也。
In ancient times, Emperor Shennong taught people to cultivate the land and became the emperor of the world, this is because people wanted to learn his wisdom. King Tang of Shang and King Wu of Zhou established powerful troops and conquered the feudal lords of the world, this is because the feudal lords succumbed to their strength.