‘Enlightenment and ignorance are seen by ordinary people as two, while the wise realize their essential nature has no duality. The essential nature without duality is the true nature. True nature is not diminished in the ordinary and ignorant, nor is it increased in the wise and the holy; it is not deranged in affliction, and it is not quiescent in meditation concentration. It does not come to an end, nor does it endure forever; it does not come and go, and it is not in the middle or the inside or outside. Unborn and unperishing, nature and characteristics as such, permanent and unchanging – this is called the Way.’ (The Platform Sutra of the Sixth Patriarch)