Chinul, a 12th-century Korean Seon master, emphasised that insight into our correct mother nature is unexpected, but would be to be accompanied by practice to ripen the Perception and attain comprehensive Buddhahood. The present-day Korean Seon grasp Seongcheol opposed this, emphasizing "unexpected enlightenment, sudden cultivation". Over the T'ang-era, the phrase https://awakening-mind.org/resources/a-course-in-miracles/