三、心土相即門
3. Mind and Land as One
西方安樂土，去此十萬億，與我介爾心，初無彼此異。
論曰：
It is said:
《佛說阿彌陀經》云：「從是西方過十萬億佛土，有世界名曰極樂。」百億日月，百億須彌，百億大海，百億鐵圍山，名一佛土。十千為萬，十萬為億。一佛國土已自廣大，況億佛國土乎？況十萬億乎？是則極樂去此甚遠。博地凡夫念佛求生，彈指即到者，正由生吾心所具之佛土也。言介爾心者，即凡夫念佛之心也。剎那之心至微至劣，故稱介爾。謂十萬億遠之佛土，居於凡夫介爾之心，即心是土，即土是心，故曰「初無彼此異」。
The Amitabha Sutra says: "West from here, passing through ten trillion Buddha-lands, there is a world called Ultimate Bliss." One hundred billion suns and moons, one hundred billion Mount Sumerus, one hundred billion great oceans, and one hundred billion iron-ring mountains make up one Buddha-land. Ten thousand make a myriad, one hundred thousand make a million, and ten million make a billion. Even a single Buddha-land is vast beyond measure—how much vaster are billions of Buddha-lands? And how much vaster are ten trillion? Thus, Ultimate Bliss is extremely far from here. Yet if ordinary beings sincerely recite the Buddha’s name and seek rebirth, they arrive in an instant. Why? Precisely because they are being reborn in the Pure Land that exists inherently within their own minds. The phrase "a mere thought" refers to the very thought of an ordinary person reciting the Buddha’s name. This momentary thought is extremely small and faint—hence the word "mere." The Pure Land, though ten trillion lands away, dwells within this mere thought of an ordinary being. The mind itself is the land, and the land itself is the mind. Therefore, it is said: "From the very beginning, there is no distinction here or there between them."
問曰：「介爾之心居於方寸，云何能包許遠佛土？」
答曰：「介爾之心，昧者謂小，達人大觀，真妄無二。蓋此妄心全性而起，性無邊，心亦無際，性如大海，心似浮漚，全海為漚，漚還匝海。蓋真如不變隨緣，隨緣不變。既曰『隨緣不變』，豈可以真妄而局大小哉！」