觀心論疏 4.5

4.5

問：何以獨約地獄及佛兩法界辯十如耶？答：地獄最惡，佛界最善，今約善惡辯十如可見者中間八界十如例知，不能委說。若得意者亦足除疑，不得意者徒繁無益也。若就別說十界百如，曆別如前。今就圓論一念之心即具百界千如，故目此心為不可思議境也。

Question: Why explain the ten suchnesses only in terms of the two dharma realms of hell and buddha? Answer: Hell is the most evil, and the realm of buddhas is the most good; now, explaining the ten suchnesses in terms of good and evil makes them visible, so that the ten suchnesses of the intermediate eight realms can be known by analogy without needing detailed explanation. For one who grasps the idea, this is also sufficient to dispel doubt; for one who does not grasp the idea, further prolixity would be useless. If explaining the ten realms and hundred suchnesses distinctly, their distinctions are as presented before. Now, discussing from the perspective of the perfect [teaching], the mind in a single thought-moment is endowed with the hundred realms and thousand suchnesses; therefore this mind is designated as the inconceivable object.