What does the blood of Abel represent?

Abel's blood symbolizes the inevitable justice required by God against sin and rebellion. After Cain murdered Abel, God noted that Abel's blood cried out for vengeance from the ground, indicating the serious nature of Cain's transgression and the accountability that each person holds before God. This narrative reveals how innocent blood demands justice but also highlights the futility of trying to justify oneself before God, as it evokes God’s judgment rather than mercy. The stark contrast with Christ's blood emphasizes the transformative power of the New Covenant established through Christ's sacrifice.