Zen cannot be attained by lectures, discussions, and debates. Only those of great perceptive capacity can clearly understand it. For this reason the ancient adepts did not waste a moment. Even when they weren’t calling on teachers to ascertain specific truths, they were involved in real Zen practice, so they eventually attained mature serenity in a natural way. They were not wrapped up in the illusions of the world. If you can do this, at some point you will suddenly turn the light of your mind around and see through illusions to the real self. Then you will understand where everything comes from—mundane passions and illusions, the material world, form and emptiness, light and darkness, principle and essence, mystery and marvel. Once you understand this clearly, then you will not be caged or trapped by anything at all, mundane or transmundane.