How do we know that God is just in forgiving our sins?

God's justice is fundamental to His nature and ensures that sin cannot simply be overlooked or ignored. As stated in Romans 3:26, God demonstrates His justice while also being the justifier of those who have faith in Jesus. This means that while He forgives sins, He does so in a way that upholds His righteousness. Since Christ fulfilled the penalty we deserved by His death, God's justice demands that we be forgiven because our debt has been paid. Therefore, the assurance we have in God's forgiveness is rooted not only in His mercy but also in His unwavering justice, which is satisfied in the gospel.