By faith Abel offered to God a more excellent sacrifice than Cain, through which he obtained witness that he was righteous, God testifying of his gifts; and through it he being dead still speaks to us today (Hebrews 11:4).
Like parents today, Adam and Eve shared everything they knew with their children. Certainly they re-told the story of God’s creation, the beauties of the Garden of Eden, their fellowship with God, their act of rebellion against Him, the consequences of their sin, and God’s provision of forgiveness through the sacrifice of an innocent substitute. Surely Cain and Abel knew from their parents that approaching God was possible by only one means.
We learn in Genesis 4:2-7 that Cain offered a sacrifice to God from the ground, something he planted, labored over, and cultivated with his own effort. He went through the motions of a ritual, bringing his self-produced offering to the Lord, full of his own work, absent of any faith in God’s provision alone.
Abel, however, brought the blood sacrifice of an innocent animal, his faith leaping across the centuries to touch the cross, the only sacrifice God would accept. And the Lord respected Abel and his offering (Genesis 4:4).
Cain trusted in himself; Abel trusted in God. Cain’s sacrifice was bloodless; Abel’s was the life of an innocent substitute. Cain gave of his own labor; Abel, by faith, accepted the death of another in his place. Angry that God did not respect Cain and his offering, Cain killed Abel (Genesis 4:5, 8).
These are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name (John 20:31).