A RAVEN saw a Swan and desired to secure for himself the same beautiful
plumage. Supposing that the Swan’s splendid white color arose from his
washing in the water in which he swam, the Raven left the altars in the
neighborhood where he picked up his living, and took up residence in
the lakes and pools. But cleansing his feathers as often as he would,
he could not change their color, while through want of food he
perished.
Change of habit cannot alter Nature.