1. If you hang the balance, you will know the balance; if there is no gauge, you will know the circle. ——Han Feizi

2. Without rules, there is no way to make a circle. ——Mencius

3. The body has no routine, the words have no permanent sect, the objects have no common use, and the scenery has no permanent choice. ——Huangfu Di

4. If the moment is not correct, it cannot be square; if the gauge is not correct, it cannot be round.

——Huainanzi