How do we know that all sins can be forgiven?

The assurance that all sins shall be forgiven is fundamental to the Christian faith. Mark 3:28 states that all sins and blasphemies can be forgiven for those who believe in Christ. This encompasses every sin imaginable—past, present, and future. This doctrine rests on the sacrificial work of Christ, whose blood purifies us from all unrighteousness. The Christian is called to trust in Christ alone for this forgiveness, embracing the assurance that nothing within us can earn it, for it is a gift of grace. Thus, Christians find their hope and standing before God not in their works but through faith in Jesus.