《黄帝四经·经法·道法》
所以说如果能够以绳墨法度自正，然后就可以识天下万物之理而不会迷惑。
能自引以绳，然后见知天下而不惑矣。
Therefore, it is said that if one can rectify oneself with the ink line and chalk line, one can then understand the principles of all things in the world and will not be confused.