God after the fall continued his fellowship with Adam, Eve, and their Children. I imagine that the relationship was similar to that of the days in the garden where God would be present in some form building a relationship with Adam and Eve. This side of the fall and curse however resulted in need for an offering for sin and an acknowledgment of how one’s sins break the relationship with God. Eve’s first two sons Cain and Abel are recorded providing offerings to God as I would assume Adam and Eve had been doing as well. Their offering may have been modeled after what God did for Adam and Eve after the original sin where God himself killed an animal to provide skin covering for their shame.
21 And the Lord God made for Adam and for his wife garments of skins and clothed them. Genesis 3:21 ESV
The outcome of these offerings from Cain and Abel should remind all of just how quickly sin escalates in the heart of men and how it impacts their family and God’s relationship with the creation.
6 The Lord said to Cain, “Why are you angry, and why has your face fallen? 7 If you do well, will you not be accepted? And if you do not do well, sin is crouching at the door. Its desire is for you, but you must rule over it.” 8 Cain spoke to Abel his brother. And when they were in the field, Cain rose up against his brother Abel and killed him. 9 Then the Lord said to Cain, “Where is Abel your brother?” He said, “I do not know; am I my brother’s keeper?” 10 And the Lord said, “What have you done? The voice of your brother’s blood is crying to me from the ground. Genesis 4:6-10 ESV
Cain and Abel both provided offerings to God however Abel’s offering was accepted by God and Cain’s offering was not. The acceptance of Abel’s offering resulted in fellowship with God the Creator. In fact the next time this kind of offering is mentioned within the Bible is when God was setting up the regular rules of engagement to Moses and Aaron.
41 The other lamb you shall offer at twilight, and shall offer with it a grain offering and its drink offering, as in the morning, for a pleasing aroma, a food offering to the Lord. 42 It shall be a regular burnt offering throughout your generations at the entrance of the tent of meeting before the Lord, where I will meet with you, to speak to you there. Exodus 29:41-42 ESV
The offering that Abel provided allowed him to meet and speak with God and God accepted the offering. Cain’s offering was rejected but still in God’s mercy and grace he continued the relationship with Cain speaking directly to him to encourage him to do the right thing if he wanted acceptance. Most likely God rejected Cain’s offering because of a heart and motive issue and he warns Cain that sin is “crouching at the door”.
14 But each person is tempted when he is lured and enticed by his own desire. 15 Then desire when it has conceived gives birth to sin, and sin when it is fully grown brings forth death. James 1:14-15 ESV
What Cain should have done is repent of the anger in his heart and turn toward God to do what he knew would be the right thing to do. God clearly indicates that He would have accepted Cain. Even after Cain had killed his own brother God in a display of undeserved mercy gives Cain an opportunity to repent for what had happened, but Cain rejects the grace of that moment by claiming to not know about what happened to Abel. God knew what happened so the questioning from God to Cain is an opportunity for Cain to turn away from the sinful path and to restore the relationship.
God provides that same opportunity for people today. While we are all sinners that deserve death because of our rebellion, God has provided his own substitutionary payment. He provided an offering we could not provide ourselves so that we can be like Abel standing before the Creator accepted and in fellowship. God’s advice to Cain is still true to people today and even more so because God has revealed his saving grace from sin in Christ.
7 For one who has died has been set free from sin. 8 Now if we have died with Christ, we believe that we will also live with him… 14 For sin will have no dominion over you, since you are not under law but under grace. Romans 6:7-8; 14 ESV