Sudden and Sudden: Seongcheol's Direct Challenge to Jinul

Jinul's formula of sudden awakening followed by gradual cultivation had stood for eight centuries as close to a settled consensus within Korean Seon, resolving an old debate inherited from Chinese Chan by letting both sides be partly right: awakening comes all at once, as a genuine seeing of one's own nature, but the deeply conditioned habits built up over a lifetime, or many lifetimes, still have to be worked through afterward through sustained practice. Seongcheol, arriving at the highest office in modern Korean Buddhism eight centuries later, rejected the compromise as incoherent rather than balanced. If awakening is genuinely sudden and complete, he argued, it cannot leave real defilement still to be gradually removed, since that would mean the awakening was never actually complete in the first place, only a partial or preliminary insight mislabeled with too strong a word. His own teaching therefore held that both awakening and its accompanying cultivation are sudden together, a position that produced considerable controversy within the Jogye Order precisely because it appeared to unsettle a formula many senior teachers regarded as doctrinally settled. Scholars of Korean Buddhism read the dispute as a genuine philosophical disagreement over what "sudden" can honestly be taken to mean, not as a personal repudiation of Jinul, whose own writings Seongcheol continued to study and whose historical standing in the tradition he never contested.