How do we know the remission of sins is true?

Hebrews 10:18 highlights that where there is complete remission of sins, there is no longer a need for any further offering. This truth is central to the gospel message, emphasizing that Christ's death and resurrection fully satisfied the debt of sin for those who believe. Through His blood, believers are justified and can approach God without fear. The assurance of this truth lies in the faithfulness of God's promises, as elaborated in verses that follow, which encourage believers to hold fast to their confession without wavering because He who promised is faithful.