Verse 16

भानोर्गणयितुं शक्या रश्मिषु त्रसरेणवः ।आलोलवपुषो ब्रह्म तत्त्वेन जगतां गणाः

In plain words

The motes in the rays of the sun could be counted — but not the hosts of worlds, trembling in form, in the reality of Brahman.