ei dui guṇa vyāpe saba bhakta-jane
ākāśera 'śabda'-guṇa yena bhūta-gaṇe
ei dui - these two; guṇa - transcendental qualities; vyāpe - expand; saba bhakta-jane - in the lives of all devotees; ākāśera - of the sky; śabda-guṇa - the quality of sound; yena - like; bhūta-gaṇe - other material elements.
The two qualities of śānta-rasa mentioned in verse 215 are present in all kinds of devotees, whether they are in dāsya-rasa, sakhya-rasa, vātsalya-rasa or madhura-rasa. The example of sound is given herein. Sound not only exists in the sky, or ether, but it is also present in air, fire, water and earth. This is a scientific explanation of devotional service. Just as sound is present in all material elements, the qualities found in śānta-rasa are present in all devotees, whether they are on the platform of dāsya-rasa, sakhya-rasa, vātsalya-rasa or madhura-rasa.