Pastor Lukus Counterman - The subject matter of Genesis 4 is the spread of sin and unbelief. Man moves further and further from Paradise in his rebellion against God, and resultantly, things wax worse and worse. In the opening verses, we find that in spite of God's warning against sin, Cain (a tiller of the ground) murdered his brother, Abel (a shepherd of the sheep). What spurred such a dastardly deed? Well, God had accepted Abel and his offering, but He had rejected Cain and his offering. Two brothers who had the same origins differed greatly when it came to the worship of God. One gave the \"best\" while the other gave \"some.\" One offered his gift in faith, while the other functionally fulfilled a duty. One sacrificed with blood, the other did not. Let us pray that the lessons from today's text teach us about the devastating effects of unbelief and the importance of authentic worship.