Why is confidence in Christ's sacrifice important for Christians?

The importance of having confidence in Christ's sacrifice lies in the assurance it provides to Christians of their access to God and the security of their salvation. The writer of Hebrews urges believers to approach the throne of grace with boldness, recognizing that Christ's sacrifice has torn down the barriers of sin and opened the way to God's presence (Hebrews 4:16). This confidence is rooted in the reality that through faith in Christ, believers are neither constrained by their past sins nor left to rely on their own righteousness, but can fully trust in the completed work of Christ as their advocate with the Father.