“Never seek this Gohonzon outside yourself. The Gohonzon exists only within the mortal flesh of us ordinary people who embrace the Lotus Sutra and chant Nam-myoho-renge-kyo. The body is the palace of the ninth consciousness, the unchanging reality that reigns over all of life’s functions. To be endowed with the Ten Worlds means that all ten, without a single exception, exist in one world. Because of this it is called a mandala. Mandala is a Sanskrit word that is translated as “perfectly endowed” or “a cluster of blessings.” This Gohonzon also is found only in the two characters for faith. This is what the sutra means when it states that one can “gain entrance through faith alone.”
Nichiren Daishonin WND Vol. 1 Page 832
12th October 1279 Nichiren inscribes the Dai Gohonzon for the happiness of all people
“With regard to the Mystic Law, benefit means wiping out evil and bringing about good (cf. OTT, 148). The daimoku of the Lotus Sutra—Nam-myoho-renge-kyo— eradicates the fundamental evil inherent in life and gives rise to fundamental good.
That’s why, by chanting daimoku, we can eliminate all forms of evil karma in an instant and manifest immeasurable good fortune and benefit.
By chanting Nam-myoho-renge-kyo a single time, we ordinary, unenlightened beings—plagued by problems, doubts, and suffering—can positively transform our circumstances in accord with the principle of “changing poison into medicine” and attain a state of life filled with hope, courage, and peace of mind. To ordinary people, this is truly an astonishing and unfathomable teaching. And because it is the wondrous and mysterious law to which the Buddha became enlightened, it is called the Mystic Law.”
 The Daishonin writes: “The element ku in the word kudoku [benefits] . . . refers to the merit achieved by wiping out evil, while the element toku or doku refers to the virtue one acquires by bringing about good” (OTT, 148).
Daisaku Ikeda: Letcture on an extract from the Gosho ‘The Daimoku of the Lotus Sutra’
 The principle that earthly desires and suffering can be transformed into benefit and enlightenment by virtue of the power of the Law. This phrase is found in a passage from Nagarjuna’s Treatise on the Great Perfection of Wisdom, which mentions “a great physician who
can change poison into medicine.” This phrase is often cited to show that any problem or suffering can be transformed eventually into the greatest happiness and fulfillment in life.
“Encouragement ignites a flame of hope in people’s hearts. It awakens courage and draws forth the strength to break through limitations.
Encouragement is a wellspring of revitalization. It is the door to transformation and the great path to victory. It is the light of hope, the voice of courage, and the way to build the future.”
“The path to achieving kosen-rufu is long—continuing far into the distant future. The key to progressing on this path will always be one-on-one encouragement.
Based on the Buddhist spirit of encouragement, we of the SGI have produced an unending stream of people who are self-reliant, awakened to their mission, and strive to realize happiness for themselves and others—people who are working to create value and contribute to world peace.”
Daisaku Ikeda’s lecture on the Gosho ‘The Two Kinds of Faith’
Here’s an excellent article by Richard Causton (1st General Director) which explains what Nichiren Buddhism means by Zange.
To read the article please click here