釋禪波羅蜜次第法門 7.28

7.28

復次，觀眾生空，故名為觀；觀實法空，故名為還；觀平等空，故名為淨。復次，空三昧相應，故名為觀；無相三昧相應，故名為還；無作三昧相應，故名為淨。復次，一切外觀名為觀，一切內觀名為還，一切非內非外觀名為淨。故先尼梵志言：「非內觀故，得是智慧；非外觀故，得是智慧；亦不無觀故，得是智慧。」

Furthermore, contemplating the emptiness of sentient beings is called contemplation; contemplating the emptiness of real dharmas is called turning back; contemplating equal emptiness is called purification. Furthermore, corresponding with the emptiness samādhi is called contemplation; corresponding with the signless samādhi is called turning back; corresponding with the wishless samādhi is called purification. Furthermore, all external contemplation is called contemplation; all internal contemplation is called turning back; all neither-internal-nor-external contemplation is called purification. Therefore, the wanderer Śreṇika said: 'It is not because of internal contemplation that this wisdom is attained; it is not because of external contemplation that this wisdom is attained; nor is it because of the absence of contemplation that this wisdom is attained.'