-No words can explain enlightenment, - says the seventh-century Zen classic Xin Ming, or -Song of Mind, - yet, paradoxically, this poem is a masterpiece of expressing the inexpressible. In his commentary on it, Chan Master Sheng Yen takes a practical approach, opening up the language of the Xin Ming to show students how to approach meditation, how to deal with problems that arise in their spiritual practice, and how to accomplish the imperative task of integrating this practice into every aspect of one's life. -True understanding comes only with direct experience, - according...