— Shen-hsui (d. 706)
The Pure Mind is the mind of untainted Suchness. The defiled mind is the mind of tainted ignorance…One who is enlightened to Suchness is unaffected by defilements and is called a sage. Such a one is eventually able to distantly transcend suffering and to realize the joy of nirvana.
One who acts in accord with the defiled is subject to its attachments and obscurations and is called an ordinary person. Such a one sinks helplessly within the triple realm and is subject to various kinds of sufferings. Why is this? Because the defiled mind obstructs the essence of Suchness.