Our True Self Buddha Nature is a product of Shinjitsu. This is ourselves in our genuine truest form. This form takes place not in the method of practice. But in the obtainment of original nature. If we are blinded and deluded and do not reflect true light, then we polish the mirror of understanding and and reflect purelight and obtain that which we have lost.
Original nature notes the true nature of our being, in other words.
Since our original nature is pure and undefiled, we reflect enlightenment. This is our original nature. When we obtain our original nature, we obtain our true selves, Shinjitsu. Amida Buddha is the culmination of wisdom and compassion. As in the Tatahagata Matrix Sutra, a sub sutra of the Mahayana Pari-Nirvana Sutra, The Gautama Siddartha tells us to find the Buddha.