Day 6 covers the main portion of Chapter 3, A Parable, the burning house explanation of the need for the Buddha to use expedients in order to save his children.

I am the father of the world. I eliminated fear, despondency, grief, ignorance and darkness. I obtained immeasurable insight, powers and fearlessness. I have great supernatural powers, the power of wisdom, the pāramitā of expedients, the pāramitā of wisdom, great compassion, and great loving-kindness. I am not tired of seeking good things or of benefiting all living beings. I have appeared in the triple world, which can be likened to the rotten and burning house, in order to save all living beings from the fires of birth, old age, disease, death, grief, sorrow, suffering, lamentation, stupidity, darkness, and the three poisons, to teach all living beings, and to cause them to attain Anuttara-samyak-saṃbodhi. I see that all living beings are burned by the fires of birth, old age, disease, death, grief, sorrow, suffering and lamentation. They undergo various sufferings because they have the five desires and the desire for gain. Because they have attachments and pursuits, they have many sufferings in their present existence, and will suffer in hell or in the world of animals or in the world of hungry spirits in their future lives. Even when they are reborn in heaven or in the world of humans, they will still have many sufferings such as poverty or parting from their beloved ones or meeting with those whom they hate.

Simply put:

Though the children heard his warning,
They were still engrossed in playing.
They did not stop playing
Because they were ignorant.

The Buddha does not fix us; he enables us to fix ourselves:

“Śāriputra! The rich man did not save his children by his muscular power although he was strong enough. He saved them from the burning house with a skillful expedient and later gave them each a large cart of treasures.

“In the same manner, I save all living beings from the burning house of the triple world, not by my powers or fearlessness, but with a skillful expedient.”

And…

“Śāriputra! The rich man persuaded his children to come out at first by promising them the gifts of the three kinds of carts. But the carts which he gave them later were the largest and most comfortable carts adorned with treasures. In spite of this, the rich man was not accused of falsehood. Neither am I. I led all living beings at first with the teaching of the Three Vehicles. Now I will save them by the Great Vehicle only. Why is that? It is because, if I had given them the teaching of the Great Vehicle at first directly from my store of the Dharma in which my immeasurable wisdom, powers and fearlessness are housed, they would not have received all of the Dharma. Śāriputra! Therefore, know this! The Buddhas divide the One Buddha-Vehicle into three by their power to employ expedients.”