In a river mist, if another boat knocks against yours, you might yell at the other fellow to stay clear. But if you notice then, that it's an empty boat, adrift with nobody aboard, you stop yelling. When you discover that all the others are drifting boats, there's no one to yell at. And when you find out you are an empty boat, there's no one to yell.
ZhuangziThe perfect man uses his mind as a mirror. It grasps nothing. It regrets nothing. It receives but does not keep.
ZhuangziIf water derives lucidity from stillness, how much more the faculties of the mind! The mind of the sage, being in repose, becomes the mirror of the universe, the speculum of all creation.
Zhuangzi