妙法蓮華經玄義 1.115

1.115

觀心引證者，《釋論》云「一陰名色，四陰名名，心但是名也。」《大經》云「能觀心性，名為上定。上定者，第一義定。」證心是體。《大經》云：「夫有心者，皆當得三菩提。」心是宗也。《遺教》云：「制心一處，無事不辦。」心是用也。《釋論》云：「三界無別法，唯是一心作。」心能地獄、心能天堂，心能凡夫、心能賢聖。覺觀心是語本，以心分別於心，證心是教相也。

As for citing proof for contemplating the mind, the *Treatise* says: 'One aggregate is named form, and four aggregates are named name; mind is merely name.' The *Great Sūtra* says: 'Being able to contemplate the nature of the mind is called supreme samādhi. Supreme samādhi is the paramārtha samādhi.' This proves that mind is the substance. The *Great Sūtra* says: 'All who have a mind shall attain sambodhi.' Mind is the central purport. The *Bequeathed Teaching* says: 'Constraining the mind to one place, nothing cannot be accomplished.' Mind is the function. The *Treatise* says: 'In the three realms there is no separate dharma; they are solely made by the one mind.' Mind can make hell, mind can make heaven; mind can make an ordinary person, mind can make sages and worthies. Awakening and contemplation of mind is the root of speech; using the mind to discriminate the mind proves that mind is the classification of teachings.