US-P16.046ab ।US-P16.046cd ॥
In plain words
If each were the cause of the other, activity would either never stop or never start. And no rule would fix where activities belong — not in the guṇas, not in the Self.
Close to the Sanskrit
If there be mutual causality, activity would be always, or not at all. And there would be no fixed rule of activities, either in the guṇas or in the Self.