चेयणं परिजाणिया, अचेयणं च जाणिया। ॥३.१॥
Having understood what is conscious and having understood what is unconscious — one is freed.
Mahavira opens Chapter 3 with the single distinction that unlocks everything else in Jain philosophy: conscious versus unconscious, soul versus matter. This is not a minor philosophical point — it is the master key. In Jain understanding, the soul (jiva) is defined by one irreducible quality: it is conscious. It knows. It experiences. It is aware. Matter (ajiva) is defined by its opposite: it does not know, it cannot be aware, it has no experience. Everything material — your body, your thoughts as physical brain-events, your emotions as biochemical states, your social identity — belongs to the category of non-soul. Mixing these two up, identifying the knowing self with any of the material layers it is wrapped in, is the fundamental confusion that creates bondage. When you think "I am my body," you have confused the knower with one of the objects known. When you think "I am my reputation," you have confused the conscious soul with a social construct. Every form of attachment flows from this confusion. The chapter's entire project is to undo it.
The simple version: The soul is the knower; the body is what is known. Mixing up the two is where suffering begins.