To him thus asking, the cow-herd thus lovingly said—"Satakratu (performer of hundred sacrifices), the king of the celestials, is the lord of the clouds and waters; ordered by him the clouds pour down water on earth, by which the grain is produced, on which we and other embodied beings live and by which we please the gods. By this too these cows bear calves and give milk and are happy and well-nourished.

In plain words: A cowherd kindly explains that Indra, king of the gods, rules the clouds and rain. Rain grows the grain that feeds people and lets them make offerings to the gods. Rain also keeps the cows healthy, so they have calves and give milk.