What can be said is unnecessary; what must be said is precisely what cannot be spoken. ZEN, the way to break limitation, tries to express the experience of inner self-awareness, but can't express them directly. Therefore, Zen often uses hints, like the various metaphors in Zen stories, which directly touch people's spiritual world and deep hearts, allowing them to comprehend the indescribable realms. This approach can still be considered innovative and groundbreaking in modern society. Rather than a religion, Zen is more a philosophy of life.