Cain and Abel

We talk about the most infamous of brothers, Cain and Abel. Most of us know the the story in which murder is introduced into the world. That one brother slew the other. 

But what do we really know about these brothers and what led to this dark and fateful outcome? Why did God favor one more than the other? And why was killing your own brother the answer?

Of course, we may never know all the answers; but we try. Because that's what we do. Try to understand the world around us.