After practicing Zen for a couple of years I have started the practice of Vipassana and Samadha, as I prefer these meditations. For the most part I like therevada Buddhism. However I'm still heavily influenced by the Mahayana and I believe in Buddha nature. I've been told more than once that Buddha nature is not a Therevadin concept. Does this mean that we don't have the seed of enlightenment within us. I see Buddha nature everywhere, within my family, friends, even my Cats, and just because I've turned to Therevada I wont change this belief.
"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