How do we know that Christ's offering is sufficient for salvation?

The sufficiency of Christ's offering is established in Hebrews 10:14, which affirms, 'For by one offering, He hath perfected forever them that are sanctified.' This verse encapsulates the entire gospel, highlighting that through Christ, believers are made perfect—lacking nothing in righteousness. The offerings of bulls and goats in the Old Testament could never take away sins, as indicated in Hebrews 10:4, but Christ's perfect sacrifice has forever secured redemption and reconciliation with God for those chosen in Him.