Chinul, a twelfth-century Korean Seon master, emphasized that insight into our real mother nature is unexpected, but should be to be followed by practice to ripen the Perception and achieve whole Buddhahood. The modern day Korean Seon master Seongcheol opposed this, emphasizing "unexpected enlightenment, unexpected cultivation". He calls it “amazing.” https://awakening-mind.org/resources/a-course-in-miracles/