Buddha Nature -Hui Neng on Buddha nature:

"all people already possess enlightenment and wisdom" "practice the meditation wherein we see all things as one and this means simply to make your mind direct" "our school has established no thought as its doctrine; but when worldly people cease thinking things are real, then they just stop their thoughts from occuring; they just stop thinking; and this is not what we mean by no thought . . . "No" means freedom from the duality which causes defilement. "Thought" means thinking the original nature of reality." "When thoughts occur spontaneously and naturally, from their own nature . . . then you are undefiled buy the thought that things are real, and you are forever free."
from the Platform Sutra of the Sixth Patriarch, translated by Stephen Beyer