The symbol of Freemasonry is: a compass on top and a ruler on the bottom, representing engineers and craftsmen. The capital letter G in the middle is the first symbol to understand Freemasonry. The capital letter G is the abbreviation of geometry. As we all know, geometry is important to modern science, and using G as the symbol of Freemasonry reflects Freemasonry's respect for science. In addition, American Freemasonry has added a God to the original Freemasonry. The purpose of Freemasonry is: "fraternity, freedom, charity, improving personal inner spirit, and promoting the perfection of human society."