The example of sound is given herein (CC Madhya 19.217). 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: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.