As we have had repeated occasion to note, Nichiren associated every step of his life with some feature of the Scripture, and especially regarded his life in Sado as the chief part, the climax, of his life. Now the last stage was to be inaugurated, and dedicated to the consummation of his mission and to the perpetuation of his religion, just as the last twelve chapters of the Scripture made up the consummation of the Truth. He had proclaimed the Sacred Title at the outset of his ministry; he had furnished the object of worship and spiritual introspection by the graphic representation of the Supreme Being; one thing alone remained — to prepare for, or establish, the central seat of his religion. These three instruments of his propaganda were called the ” Three Mysteries.” Although there are some allusions to them in his writings before this time, Nichiren proclaimed this trinity for the first time in the first essay written after his retirement. This treatise is dated the twenty-fourth of the fifth month (June 24) — just a week after his arrival at Minobu. The great plan which he had long been meditating, and the motive which led him to retire from the present world, and to work for the future, was the establishment of the “Kaidan,” or the Holy See of the Catholic Church of Buddhism.