Cain Murders Abel

Aside from an account of their birth, their bringing an offering to G‑d, and Cain’s horrifying murder of Abel, the Torah’s description of their lives is brief and cryptic.

Part of what makes this so shocking is that it seems to come out of nowhere.

Apparently, sibling rivalry is as old as siblings themselves. Consider Cain and Abel. You have to wonder how Cain, reared by parents who spoke to G-d Himself, went so extremely off the rails and murdered his own brother!