Why is it significant that Abel's offering was by faith?

Abel's offering, described in Hebrews 11:4, is significant because it exemplifies the principle that true worship comes from faith. The text emphasizes that Abel offered a more excellent sacrifice than Cain because it was rooted in belief in God's revealed truth. This aspect of faith signifies that worship is not merely about the external act but about the internal condition of the heart. Abel's obedience to God’s criteria for sacrifice points to the greater sacrifice of Christ, the Lamb of God, affirming that God accepts worship only through faith in His appointed means of salvation. This faith reveals a heart transformed by grace, opposed to the self-willed worship exemplified by Cain.