There is practice and enlightenment that the buddha-ancestors have guarded and observed: it is called the negation of tainting.
The sixth ancestor in China, Daikan Eno, asks Nangaku Ejo: "Are you into practice and enlightenment?"
Nangaku Ejo replies, "It is not that there is no practice and enlightenment, but tainting them is just what is not allowed."
Daikan Eno says, "This not tainting, and this alone, is what the buddhas guard and attend to. You are like that and so am I, and so were the ancestral masters of India..."
-- to be continued, maybe...