Pai-chang Huai-hai (720-814).

Question: How is it possible to realise a share of freedom?

The master said, Right now you have it, if you have it. Otherwise, in the face of the five desires and eight winds, if there is no grasping or rejection in your feelings, when feelings of possessiveness, jealousy, greed and craving, of self and possessions, all come to an end, defilement and purity are both forgotten - you will be like the sun or moon in the sky, shining independently. When mind and the mental conditions are like earth, wood or stone, moment after moment, like saving your head were it ablaze, also like the great scent-bearing elephant crossing a river, cutting off the flow as he passes, causing there to be no doubt or error, this person neither heaven nor hell can contain.

P82. Sayings and Doings of Pai-chang. Translated by Thomas Cleary.