Verse 4

मनःस्वन्येषु वातान्तलोलाहतकणेष्विव ।अनारतं विनिर्यान्ति विशन्त्यन्ये तथाभितः

In plain words

— within other minds, as among motes struck restless within the wind: ceaselessly they go forth, and others likewise enter, on every side.