The god Vishnu dug this tank.

He had nothing to dig with but his "discus." I do not know what a discus is, but I know it is a poor thing to dig tanks with, because, by the time this one was finished, it was full of sweat--Vishnu's sweat.

He constructed the site that Benares stands on, and afterward built the globe around it, and thought nothing of it, yet sweated like that over a little thing like this tank.
One of these statements is doubtful.

I do not know which one it is, but I think it difficult not to believe that a god who could build a world around Benares would not be intelligent enough to build it around the tank too, and not have to dig it.

Youth, long life, temporary purification from sin, salvation through propitiation of the Great Fate -- these are all good.