How do we know Jesus took away the sins of the world?

Jesus' capacity to take away the sins of the world is illustrated in John 1:29, where John the Baptist declares, 'Behold the Lamb of God, which taketh away the sin of the world.' This highlights that Jesus' sacrifice was not merely a possibility for salvation but an absolute reality; He bore and removed the sins of His people entirely. The theology of sovereign grace affirms that salvation is solely by God's initiative and work, with no human contribution. Ephesians 2:8-9 underscores this truth, stating that we are saved by grace through faith, not of ourselves. Thus, the assurance comes from the complete and finished work of Christ, providing full alleviation from the guilt and penalty of sin.