What does the Bible say about entering the holiest by the blood of Jesus?

Hebrews 10:19-22 teaches that believers have been granted boldness to enter the holiest of holies by the blood of Jesus. This signifies that through His sacrificial death, access to God's presence is fully granted to us. The phrase 'having therefore, brethren, boldness' indicates that our acceptance before God is not based on our own merit but solely on Christ's perfect sacrifice. Therefore, we can confidently approach God, assured of His grace and mercy, as our sin has been atoned for by the blood of Christ.