《淮南子·修务训》
有人说： 所谓无为，就是寂然无声，漠然不动；拉他他不来，推他他不去。像这样子，才叫把握道的原则。 
或曰： 无为者，寂然无声，漠然不动，引之不来，推之不往；如此者，乃得道之像。 
Some say: The so-called inaction is silent and doesn’t move. If you pull him, he will not come; if you push him, he will not go. Only in this way can we grasp the principles of Tao.