"I cannot recognize the true face of Mount Lu, only because I am within this mountain itself." What meanings does this contain?

If Mount Lu is used as a metaphor for worldly dharmas, the reason we cannot see the false, illusory, and unreal nature of worldly dharmas, cannot see their nature of suffering, emptiness, impermanence, and non-self, is that our own mind is pressed too closely against worldly dharmas. We may even melt completely into worldly dharmas, with no gap in between, so that the mind is entirely obscured by them. As a result, year after year, month after month, life after life, we experience joy, anger, sorrow, and happiness within worldly dharmas, are turned by worldly dharmas, and are bound by the worldly, so that our own body and mind cannot attain ease and liberation. If we wish to be liberated, what should we do?

If Mount Lu is used as a metaphor for one's own deluded mind—the seven consciousnesses—how can one clearly recognize the arising, ceasing, changing, and unreal nature of the deluded mind? To view one's own mind objectively and clearly recognize one's own mental activities, one must take the mind out, then turn back to reflect upon it, keeping a certain distance and standing at a certain height to objectively observe one's own mental activities, or observe them as if they were the mental activities of another person. In this way, one will be somewhat more objective and fair-minded.

If Mount Lu is used as a metaphor for the body of the five aggregates, then life after life we dwell within the body of the five aggregates, yet do not know that the five aggregates are without self, do not know that the five aggregates are impermanent, arising, ceasing, and changing, and do not know the suffering and emptiness of the five aggregates. To thoroughly and anew recognize the true face of the five aggregates, one must contemplate the five aggregates in accordance with the Four Noble Truths taught by the Buddha. If one wishes to recognize the true face of the body of the five aggregates, one must cultivate and study the Mahāyāna prajñā and investigate the tathāgatagarbha within the body of the five aggregates. Then one will recognize that the original face of the body of the five aggregates is in fact the tathāgatagarbha; the body of the five aggregates is an illusory false appearance manifested by the tathāgatagarbha, with the truth hidden within the body of the five aggregates, performing its transforming magic tricks, unfathomable to worldly people.