It is by mankind, in all kinds of existence, that the ideal perfection is to be achieved, and therefore the stage of its realization is this world, the abode of mankind. The Buddhist ideal of enlightenment is man’s awaking to the fundamental unity of his present existence with the primeval Buddhahood; while the key to make this world a hell or to transform it into a heaven is in our own hands. The use of the key consists in first calling forth the primeval Buddhahood in the innermost recess of our own soul, and in viewing this actual world as a heaven. This transfiguration means not merely imagining that earth is heaven, but living in conformity with the assumption, under the guidance of the enlightened mind. This ideal was realized by Buddha when he preached the Lotus of Truth on Vulture Peak, and the scene of the revelation was transfigured into a paradise. Nichiren had no doubt about the Scripture narrative, and now, in Minobu, he was himself experiencing such a transfiguration of his own abode.
Nichiren, The Buddhist Prophet