parjanyo bhagavan indro
te ’bhivarsanti bhutanam
prinanam jivanam payah
Nanda Maharaja replied: The great Lord Indra is the controller of the rain. The clouds are his personal representatives, and they directly provide rainwater, which gives happiness and sustenance to all creatures.
Without clean rainwater, the earth could not possibly provide food or drink for anyone, nor could there be cleanliness. Thus it would be difficult to overestimate the value of rain.