The inventory of the field is now complete. Desire and aversion, pleasure and pain — these inner movements of the mind are also parts of the field. The bodily aggregate, the consciousness that animates it, and the capacity for steadfastness — all of this together is the field, described here along with its modifications.
Notice something striking: even pleasure and pain belong to the field, not to the soul. When we feel 'I am suffering,' that experience happens at the level of the body-mind. The Kshetragna — the inner witness — is neither happy nor sad.