There are no greater adversaries than yin and yang, because nothing in Heaven or on Earth escapes them. But it is not yin and yang that do this, it is your heart that makes it so.
ZhuangziLove of colors bewilders the eye and it fails to see right. Love of harmonies bewitches the ear, and it loses its true hearing. Love of perfumes fills the head with dizziness. Love of flavors ruins the taste. Desires unsettle the heart until the original nature runs amok. These five are enemies of true life. Yet these are what men of discernment claim to live for. They are not what I live for. If this is life, then pigeons in a cage have found happiness!
ZhuangziA battering ram can knock down a city wall, but it cannot stop a hole. Different things have different uses.
Zhuangzi