'Thus does that serene being, arising from this body, appear in its own form, as soon as it has approached the highest light (the knowledge of Self). He (in that state) is the highest person (uttama pfirusha). He moves about there laughing (or eating), playing, and rejoicing (in his mind), be it with women, carriages, or relatives, never minding that body into which he was born. 'Like as a horse attached to a cart, so is the spirit (prâna, pragñâtman) attached to this body.

In plain words: In the same way, the peaceful Self rises from the body and shows its true form when it reaches the highest light, which is knowledge of the Self. Then it is the highest person, free and joyful, not caring about the body it was born in. The spirit is tied to the body like a horse to a cart.