Abel is considered righteous because he offered his sacrifice by faith, trusting in God's provision for atonement.
Abel's righteousness is highlighted in Hebrews 11:4, which reveals that he offered his sacrifice in faith. This faith signified his understanding of sin and the necessity of a blood sacrifice to approach God. While Cain's offering was based on his own efforts and lacked acknowledgment of his sinful state, Abel's act illustrated a reliance on God’s promise of redemption. As Abel believed in the coming Savior, he exemplified the true nature of worship characterized by faith, and thus God testified of his righteousness. This serves as a reminder that acceptance before God is based on faith in Christ’s atoning work, rather than our own merits.
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