四明十義書 1.184

1.184

須知但觀內心即空假中已，自然見外一一色心皆空假中也。故《輔行》云：攬外向，內令觀內識皆是一識。識既空已，十界皆空。假中亦然。既觀識空已方云十界皆空等也，則知修內觀時不放心觀外，乃是外法自然趣內也。淨心歷外、正觀觀外、內法趣外，豈不然耶？

One must know that simply by contemplating the internal mind as identical to emptiness, conventional existence, and the Middle, one naturally sees that each and every external form and mind is identical to emptiness, conventional existence, and the Middle. Therefore the Fuxing says: 'Gathering the external toward the internal causes one to contemplate internal consciousness as all being a single consciousness. Once consciousness is empty, the ten realms are all empty; the same applies to conventional existence and the Middle.' Since it is only after contemplating consciousness as empty that it says the ten realms are all empty, etc., one knows that when cultivating internal contemplation, one does not let the mind wander to contemplate the external; rather, external dharmas naturally converge toward the internal. The pure mind passing through the external, the correct contemplation contemplating the external, and internal dharmas converging toward the external—how could they not be so?