The vehicle

The engine of the last chapter scores a groove in the mind. But the body burns. On the cremation ground the physical form is given back to its elements, and with it, to all appearances, the brain that held every memory and every learned tendency. If karma is to reach a next life, the groove has to survive the fire. Something has to leave the pyre carrying the account.

The tradition names that something with unusual precision, and then, more remarkably, draws a map of the road it takes.

The body that does not burn

Hindu thought does not treat a person as a single body. It counts several, nested one inside another, and the site’s article on the subtle body sets out the anatomy in full. The one that matters here is the middle body, the sukshma sharira, the subtle body, sometimes called the linga sharira, the mark-body, because it carries the marks of all a person has done.

The subtle body is woven of what the physical body is not: the mind, manas; the discriminating intellect, buddhi; the sense of I, ahamkara; the subtle counterparts of the senses; and prana, the vital breath. It is this body, the tradition holds, that detaches at death, intact, bearing the whole burden of samskaras and the portion of karma next in line to ripen. The gross body returns to earth, water, fire, air and space. The subtle body carries on, and it carries the account with it. Dasgupta, mapping the Vedanta psychology, describes it as the vehicle of transmigration: the persistent subtle organism in which the residues of action are lodged and conveyed from one gross body to the next.

This is the answer to the question the last chapter left open. The groove is not stored in the brain that burns. It is stored in the subtle body that does not.

Two roads from the pyre

Here the tradition does something few religious systems attempt. It maps the journey.

In the fifth chapter of the Chandogya Upanishad, and again in the sixth chapter of the Brihadaranyaka, there is a teaching the tradition calls the panchagni vidya, the doctrine of the five fires. It describes the passage of the departed through a sequence of cosmic stages, figured as five sacrificial fires, by which a soul is at last reborn into a new body. Woven into it is a fork in the road, and the fork is the point that matters for a treatise on karma.

The departed travel one of two paths. There is the devayana, the path of the gods, also called the path of light: the way of those who have known the Self, leading through fire, day, the bright fortnight, the northward course of the sun, and on toward the world of Brahman, from which there is no return. And there is the pitryana, the path of the ancestors, also called the path of smoke: the way of those who have lived by works and merit, leading through smoke, night, the dark fortnight, the southward course of the sun, to the world of the moon, where the fruits of good works are enjoyed until they are spent, and then, spent, the soul falls back to earth and is born again.

Read that second path closely, because it is the engine of rebirth stated as a journey. Even heaven runs out. The one who has done good but has not seen through the whole game rises to enjoy the reward, exhausts it, and returns. The wheel is not a metaphor here. It is an itinerary.

The Bhagavad Gita compresses the whole teaching into three verses. At 8.24 through 8.26, in Telang’s rendering, Krishna names the two courses by which the departed go, the bright and the dark, the one from which there is no return and the one that comes back, and calls them the eternal paths of the world. What the Upanishads lay out at length, the Gita fixes in an epigram.

The ladder of births

The subtle body carries the account, and the account decides not only where the soul goes but what it comes back as.

The tradition holds that rebirth runs across a whole ladder of forms, from the lowest creatures to the gods, and that a being’s place on the ladder in any life answers to its karma. The Manusmriti, in its twelfth chapter, sorts this by the three gunas, the strands of nature the site treats in its article on the three gunas: those in whom sattva, clarity, predominates rise toward the divine; those governed by rajas, passion, take human birth; those sunk in tamas, inertia, fall toward the animal and below. It is a hierarchy, and later chapters of this treatise will have to reckon with what the tradition did when it read human social rank onto the same ladder. Here the point is narrower and structural. Karma does not only meter when a soul returns. It sets the terms of the return: the species, the circumstances, the whole frame that the last chapter called prarabdha.

What the map does and does not settle

A reader should be told plainly that the tradition itself does not agree on how literally to take all this. Some read the five fires and the two paths as cosmology, a real account of real stages. Others, especially in the non-dual schools, read them as instruction dressed as journey, a way of teaching the difference between the life that leads out and the life that circles back. The treatise does not rule between these readings. It presents the map as the tradition drew it and lets the reader hold it at whatever distance seems right.

What is not in dispute, across the schools, is the structural claim. Something survives the fire. It carries the marks of what was done. It travels, by one road or another, to a birth that answers to those marks. The vehicle is real even where the map is read as metaphor.

And here the machinery, laid out over three chapters, produces a question it cannot answer from inside. If every birth is the fruit of prior karma, and that karma the fruit of a birth before it, the chain runs backward without visible end. Where did it start? Who struck the first blow that set the whole account in motion? And if no one did, is the God who presides over this system not, in the end, unfair?

That question has broken lesser doctrines. The next chapter meets it.