A response of "no" is given to the question if a (*) dog has the nature needed to achieve this concept in the first case of the Gateless Gate.
In one text, a person is the direct cause of achieving this concept just like milk is the direct cause of cream, implying that all sentient beings can achieve this concept. In that same text, this concept is the perfection of the four qualities of being truly permanent, truly blissful, truly self, and truly pure. A response of "no" is given to the question if a (*) dog has the nature needed to achieve this concept in the first case of the Gateless Gate. Nam-Myoho-Renge-Kyo is chanted by followers of Nichiren to achieve this concept. The liberation of all people by helping them awaken their inner this nature is the goal of the bodhisattva. The Nirvana Sutra focuses on, for 10 points, what concept also known as perfect enlightenment that was famously achieved after sitting under a bodhi tree by Shakyamuni?
In one text, a person is the direct cause of achieving this concept just like milk is the direct cause of cream, implying that all sentient beings can achieve this concept.
Buddhahood [accept Buddha-nature; accept word forms that indicating becoming a Buddha; accept highest nirvana; accept Tathagatagarbha; accept Fo-xing; accept perfect enlightenment before mention, prompt on "enlightenment" after;  prompt on "bodhisattva"-hood; prompt on "Nirvana" as Buddhahood is the Highest Nirvana]