All sentient beings, from beginningless kalpas up to now, have lost sight of their true original nature, mistaking the false for the real, treating the servant as the master, and giving rise to greed and aversion in error. Thus they create karma and undergo retribution, like spring silkworms spinning cocoons around themselves, entangling and binding themselves with no chance of liberation. The ignorant, in their folly, accept their suffering passively and seek no way out; the wise, though aware that birth and death are the great matter and that the sea of suffering is boundless, wish for liberation but find no door to it.

Out of compassion for sentient beings who have no means to escape suffering, Shakyamuni Buddha appeared in the world to teach and transform them. All the Buddhist scriptures and treatises, and all the Dharma gates, without exception revolve around this central theme—the realization of the true mind and the seeing of one's own nature—to expound and illuminate it, enabling people to awaken from deluded attachments, eliminate ignorance, abandon the false and return to the true, and find their way home.

Among them, the one that is simple, swift, and easy to practice, and closest to the Zen approach, is none other than the "Heart Essence Secret Dharma" (Mind Center Secret Method). For this Dharma is a formless esoteric practice, free from elaborate rituals and requiring no altar setup. Anyone, anywhere, at any time, can cultivate it. Moreover, without detours or preliminary practices that transition from form to formlessness, it enables one to directly realize the essence and function from the very start. Therefore, people of the world often praise it as "Zen-esoteric," a term not entirely precise but nonetheless carrying substantial truth.