I read somewhere that the Theravada school doesn't believe that sentient beings have Buddha nature, that it's something we have to work towards rather than uncover. Does this mean that until one attains enlightenment there's no Buddha nature anywhere to be found within oneself? That no Animals have even a microbe of Buddha nature? This seems very cold.
"The original heart/mind shines like pure, clear water with the sweetest taste. But if the heart is pure, is our practice over? No, we must not cling even to this purity. We must go beyond all duality, all concepts, all bad, all good, all pure, all impure. We must go beyond self and nonself, beyond birth and death. When we see with the eye of wisdom, we know that the true Buddha is timeless, unborn, unrelated to any body, any history, any image. Buddha is the ground of all being, the realization of the truth of the unmoving mind.” Ajahn Chah