In China, about 300 B.C., Mencius wrote "A master Mason, in
teaching his apprentices, makes use of the compasses and the
square. Ye who are engaged in the pursuit of Wisdom, must also
make use of the compasses and the square." Additionally, in a
book called Great Learning, 500 B.C., we find that "A
man should abstain from doing unto others what he would not they
should do unto him; and this is called the principle of acting
on the square."