Genesis 4

It's interesting how here everyone still hears God's voice and still talks with him almost like they're face-to-face.  Literary embellishment or truth?  Abel and Cain--jealousy.  Why didn't You like Cain's offering?  And seems like You just brush off his anger and upsetness.  But later you address his concerns even while punishing him for killing Abel--you still loved him.  Good to know.  But I've heard You view all sin as the same--is that true?  Please help me to recognize my sin and truly repent of it--I've always been bad at that.