“The poor son, having wandered from town to town, from country to country, from village to village, came to the city where his father was living.

Past conditions led [him] toward the city where “his father” was staying: li is [what is to be] “reached. ”

The father had been thinking of him for more than fifty years since he had lost him, but never told others [that he had a missing son]. He was alone, pining for his son.

Compassion [arose in the Buddha], thinking they might go astray from li. Yet the “sons,” after receiving the teaching, were lost and immersed in the five forms of existence: this is [the meaning of] “fifty years. ”

[never told others] This means that [the Buddha] never mentioned to others that the two vehicles would achieve Buddhahood. The Buddha’s Great Benevolence was originally aimed at uprooting the suffering [of others], but as they enjoyed birth and death, the true transformative teaching was then turned backward. Here arose the necessity for the exigency of the three. The three [were presented] in accord with the subtle state of their (beings’) minds, and thereafter he would be able to produce the One for them.

[The Buddha] regretted that the earlier transformative teaching was not intensive, with the result that they (beings) returned to delusion and transmigration (saṃsāra). Entirely out of compassion he devised all-round, [provisionary] expressions.

He thought, ‘I am old and decrepit. I have many treasures. My storehouses are filled with gold, silver, and other treasures. But I have no son [other than the missing one]. When I die, my treasures will be scattered and lost. I have no one to transfer my treasures to. Therefore, I am always yearning for my son.’ The father thought again, ‘If I can find my son and give him my treasures, I shall be happy and peaceful, and have nothing more to worry about.’

[The words] old and decrepit refer to [the Buddha’s] last stage of incarnation. [The statement] we have no son means that [the Buddha] has not yet said that the two vehicles will attain to the Buddhahood. [The Buddha] worries that there is nobody to whom to bequeath the treasure of the unexcelled Dharma.