The pariniṣpanna-svabhāva (perfectly accomplished nature) of the tathāgatagarbha is inherently complete in itself

The pariniṣpanna nature (pariniṣpanna-svabhāva) of the tathāgatagarbha is not something that can be brought about by the five aggregates and the seven consciousnesses; it refers to the inherent virtue of the tathāgatagarbha, which is originally capable of perfectly accomplishing all dharmas. The tathāgatagarbha is originally endowed with this nature, and it does not need to be achieved through later cultivation. Even ordinary beings and beings in the three evil destinies all possess the pariniṣpanna nature of the tathāgatagarbha; otherwise, ordinary beings could not even exist, and sentient beings would have no dharmas at all.