How do we know that Christ's sacrifice is sufficient for our holiness?

The sufficiency of Christ's sacrifice for our holiness is firmly established in Scripture, particularly in 1 Corinthians 1:30, which states that Christ became our wisdom, righteousness, sanctification, and redemption. Through His work on Calvary, He fulfilled the requirements for holiness that God demands. Moreover, His resurrection and ascension signify that our eternal acceptance before God is secured by His righteousness, not our imperfect efforts. Thus, believers can be confident that they are accepted because they are 'in Christ,' who embodies holiness itself.