A Rat

A got a call today from an old friend. He was calling to check in on me and see how things were going with the book. He told me something that struck a nerve with me. I'm not sure what he meant by it. But I know he meant it with good intentions. He asked me what's the difference between a beaver and a rat? I said I don't know what's the difference. He said, a beaver is smart enough to build a dam to provide shelter and to protect his family. And a rat is just a rat.