The Borrowed Body
An issued instrument, to be maintained and returned.
The text’s medicine and health material, framed by its own metaphor: the body as an instrument you were issued, must maintain, and will return. Steward versus owner: health as duty to the lender, not vanity.
The Man Who Maintained the Instrument Anyway

In July 1999, during the Kargil war, a shell burst beside Major D.P. Singh of the Indian Army. The list of what the blast took is long: it shredded his right leg and drove shrapnel through much of his body. It stopped him so completely that he was, by his own telling, initially declared dead at the field hospital. He survived the declaration, then the amputation of the leg, then years of rebuilding a body that carried metal fragments in it for good.
What he did next is why he opens this lesson. Singh took up running. On a blade prosthesis, with a war-broken body, he trained, finished a half marathon, then another, then dozens, becoming known as India's first blade runner. He founded a community, The Challenging Ones, that has trained hundreds of amputees into athletes. His stated logic was always maintenance, not miracle: this is the instrument I was issued; it is damaged; it is still issued to me; therefore it will be kept in the best order it permits.
That sentence, almost word for word, is this lesson's teaching. The Garuda Purana has already told you what the body is. The funeral fire of Chapter 4 returned it, element by element, to the lenders. The counsel chapter now draws the conclusion for the living: you are not the owner of this body. You are its steward, and stewardship has duties that begin today.
Medicine, in the Book of Death
Start with the fact that surprises everyone, the Book of Everything reveal from Chapter 1 paying off. The Garuda Purana's encyclopedic first half carries medical material: sections on disease, remedies, and the maintenance of the body, sitting in the same binding as the funeral liturgy. Ayurvedic content, in the book families are afraid to keep in the house.