Jetsün Chokyi Gyaltsen:
Definition of naturally abiding buddha nature:
“The emptiness of a mind with obscurations, and being suitable to transform into the nature truth body.
Naturally abiding lineage is like the unknown treasure hidden in the ground of the poor farmer’s court yard. Once the gods tell the farmer family about the treasure hidden in their ground, they can use it. Similarly, buddha nature is hidden in our mind, and once the buddhas have told us about it we can use it.”