其の上は私に計り申すに及ばず候 叶ひ叶はぬは御信心により候べし - Now there is no need to attempt to surmise yourself how things will go. Whether or not your prayer is answered will depend on your faith

本文
其の上は 私に計り申すに及ばず候 叶ひ叶はぬは御信心により候べし 全く日蓮がとがにあらず、
水すめば 月うつる 風ふけば 木ゆるぐごとく・みなの御心は水のごとし 信の よはきは にごるがごとし、信心の・いさぎよきは すめるがごとし
木は道理のごとし・風のゆるがすは経文をよむがごとしと・をぼしめせ

日厳尼御前御返事
（１２６２頁）
弘安３年１０月
（１２８０年）

通解（意訳）
信心の功徳について、これを自分勝手の解釈で御本尊の功徳を推し量ってはならない。
日蓮が、あなたの願いをいくら祈ったところで、願いが叶うか叶わないかは、結局は全てあなたの御信心によるものであり、全く日蓮のせいではない。
例えば、水が澄めば月はきれいに映り、風が吹けば木の枝が揺れるように、人の心は水のようなものであ。
信人が弱いのは、水が濁っているようなものであり、信心が強く潔いのは、水が澄んでいるようなものである。
木は仏法の道理のようなものであり、風がその木を揺り動かすことは、朝夕の勤行・唱題を怠らず、信心を深めていく努力と、現実と向き合って、願いが成就するよう努力をする事である。
＊「題目をあげていればなんとかなる」と、自分が努力する事を怠れば、せっかく諸天が動いたとしても、願いは成就しない。
自分の信心を深め、行学を実践していきなさい。
仏法の道理である「南無妙法蓮華経」の御本尊を揺り動かすような実践の信心と同時に、現実を変えようとする努力をするところに、御本尊の功徳が顕れるのだと、しっかり心得ていきなさい。

English Gosho
 Now there is no need to attempt to surmise yourself how things will go. 
Whether or not your prayer is answered will depend on your faith ;[if it is not] I will in no way be to blame.
 When water is clear, the moon is reflected. When the wind blows, the trees shake. Our minds are like the water.
 Faith that is weak is like muddy water, while faith that is brave is like clear water. Understand that the trees are like principles, and the wind that shakes them is like the recitation of the sutra.

" Reply to the Lay Nun Nichigon "
"The Writings of Nichiren Daishonin", Vol.1, p. 1079
October, 1280.
[ --- ] is liberal translation.

Interpretation (liberal translation)
About benefit of the faith, you must not guess benefit of Gohonzon by interpretation of the selfishness in this.
 All depends on your faith whether a wish comes true, or it does not come true even if Nichiren prayed for your wish as anything after all. It is never fault of Nichiren.
 For example, the moon is reflected in the water neatly if water is clean. If wind blows, the branch of the tree shakes.
 In this way, the heart of the person is like the water. It virtually has muddy water that faith is weak. It is virtually clear water of that faith is strongly manly. The tree is like the reason of the Buddhism. It is something like practice of your faith that wind shakes the tree. 
 One necessary for you is to work hard to deepen faith of your own without neglecting Gongyo and Chanting the Daimoku of morning and evening. and, facing severe reality, it is to make an effort so that a wish accomplishes it.
The wish does not accomplish it only by your depending on Gohonzon, and thinking, "I manage it if I pray for Daimoku", and chanting the Daimoku.
If this neglects the effort that oneself shakes a tree, the tree shakes; there is not. It is reason same as this.
 The thing necessary for you is not only to deepen your faith definitely to grant a wish.
It is faith of the practice training yourself, and moves Gohonzon of "Nam-Myoho-Renge-Kyo" which is reason of the Buddhism, reason of nature of right Buddhism.
 And with it, you practice an effort to change reality. When practice of the faith and your effort were accompanied, Benefit of Gohonzon appears.
Understand this thing well.

参考文献：
「日蓮大聖人御書全集」
「御書をひもとく」
「英語で学ぶ御書」
第三文明社
Bibliography :
"The Writings of Nichiren Daishonin"
"The Record of The Orally Transmitted Teachings"