It is learned from the revealed scriptures that the moon was born from the milk ocean. There is a milk ocean in the upper planets, and there Lord Visnu, who controls the heart of every living being as Paramatma (the Supersoul), resides as the Ksirodakasayi Visnu. Those who do not believe in the existence of the ocean of milk because they have experience only of the salty water in the ocean should know that the world is also called the go, which means the cow. The urine of a cow is salty, and according to Ayur-vedic medicine the cows urine is very effective in treating patients suffering from liver trouble. Such patients may not have any experience of the cows milk because milk is never given to liver patients. But the liver patient may know that the cow has milk also, although he has never tasted it. Similarly, men who have experience only of this tiny planet where the saltwater ocean exists may take information from the revealed scriptures that there is also an ocean of milk, although we have never seen it. From this ocean of milk the moon was born, but the fish in the milk ocean could not recognize that the moon. was not another fish and was different from them. The fish took the moon to be one of them or maybe something illuminating, but nothing more. The unfortunate persons who do not recognize Lord Krsna are like such fish. They take Him to be one of them, although a little extraordinary in opulence, strength, etc. The Bhagavad-gita (9.11) confirms such foolish persons to be most unfortunate: avajananti mam mudha manusim tanum asritam.