Why was Cain's sacrifice not accepted? What even is a sacrifice, and what makes it acceptable? What does it mean to master temptation? What does it mean to be mastered by temptation? What does it mean to be cursed by God? Who needs to repent: only the oppressors, or all of us? And what does repentance look like, for both? Does God actually hear the cries of the victims, and how does he bring justice?

In this return to the text of Genesis and our walkthrough of the Scriptures, we see that each of us can at any time become either Cain or Abel. We look at the ways in which some portions of this narrative have been used to cause hurt, and we examine what it means for God to call both the innocent and the guilty to master the crouching sin-beast in at the doorway of their own hearts.

A Demon at the Door? | memoirandremains

Genesis 4 – What History’s First Criminal Report Can Teach Us - Cerebral Faith

Cain, the Sinner - The Whole Counsel Blog