Instantaneous Practice.

[Shi Da Dao]

'At this time, a monk asked Kuei Shan, "Should one who has attained instantaneous enlightenment continue the practice?" The master replied, "If one has truly realised the fundamental, one will know everything about it; practice and no practice are the two sides of a dualism. If, due to an intervening cause, one is instantly awakened to the truth in the time of a thought, there still exists since time without beginning the force of habit which cannot be eliminated at a stroke.

(In this case), one should be taught (by one's teacher) completely to cut the flow of discrimination caused by outstanding karmas; this is practice but it does not mean that there really is a definite method which one should be urged to follow and practice.

When one succeeds in entering the truth after hearing the expounding of the real and its wonderful abstruseness, one's mind will automatically be pure and all-embracing; (thus) one will be free from illusion, but in spite of hundreds and thousands of wonderful meaning being reveled to one simultaneously, this (only) means that one is qualified to take a seat, wear a robe, and understand one's own self, in a life now free from delusion.'

(Ch'an and Zen Teaching - Second Series: By Charles Luk - Page 60).