tathā kālena dehinaḥ

yatha-just as; prayanti-move apart; samyanti-come together; srotah-vegena-by the force of waves; balukah-the small particles of sand; samyujyante-they are united; viyujyante-they are separated; tatha-similarly; kalena-by time; dehinah-the living entities who have accepted material bodies.