Day 31 covers Chapter 27, King Wonderful-Adornment as the Previous Life of a Bodhisattva.

The king may hold the title, but the sons, Pure-Store and Pure-Eyes, are the story. These were not ordinary children.

A long time ago, they had already practiced the Way which Bodhisattvas should practice. They had already practiced the dāna-pāramitā, the śīla-pāramitā, the kṣānti-pāramitā, the virya-pāramitā, the dhyāna-pāramitā, the prajñā-pāramitā, and the pāramitā of expediency. They also had already obtained [the four states of mind towards all living beings:] compassion, loving-kindness, joy and impartiality. They also had already practiced the thirty-seven ways to enlightenment. They had done all this perfectly and clearly.

The sons, at the urging of their mother, showed off their supernatural powers before their father in an effort to dissuade him from his heretical views and encourage him to follow Cloud-Thunderpeal-Star-King-Flower-Wisdom Buddha. They were successful:

By displaying these various wonders, they purified the mind of their father, that is, of the king, and caused him to understand the Dharma by faith.

As the sons explain it to their mother: “We did the work of the Buddha for the sake of our father.”

And again:

The two sons led their father by these expedients and caused him to understand the teachings of the Buddha by faith and to wish [to act according to those teachings].

And in the words of their father:

These two sons of mine did the work of the Buddha. They converted me from wrong views by displaying wonders. They caused me to dwell peacefully in your teachings. They caused me to see you. These two sons of mine are my teachers. They appeared in my family in order to benefit me. They inspired the roots of good which I had planted in my previous existence.’

Teachers sprout from the roots of good. As Cloud-Thunderpeal-Star-King-Flower-Wisdom Buddha said to the father of the sons:

The good men or women who plant the roots of good will obtain teachers in their successive lives. The teachers will do the work of the Buddha, show the Way [to them], teach them, benefit them, cause them to rejoice, and cause them to enter into the Way to Anuttara-samyak-saṃbodhi. Great King, know this! A teacher is a great cause [of your enlightenment] because he leads you, and causes you to see a Buddha and aspire for Anuttara-samyak-saṃbodhi.