How do we know Jesus' victory over sin is assured?

The assurance of Jesus Christ's victory over sin is firmly established in His sacrificial death, as highlighted in Hebrews 9:26, which states that Christ 'appeared to put away sin by the sacrifice of Himself.' This beautiful truth affirms that all that was necessary for the atonement of sin has been accomplished in Him. Moreover, in 1 Corinthians 15:26, it is declared that the last enemy, death, will ultimately be destroyed through Christ's resurrection. The implication of these verses is that believers can rest in the completed work of Jesus, knowing that He has conquered sin and death on their behalf, thus securing their redemption and eternal life.