How do we know forgiveness is a key concept in Christianity?

Forgiveness is foundational in Christianity, as it is through Christ's sacrificial death that believers are completely forgiven. The Bible states that God does not remember our sins once they are covered by Christ's blood; this illustrates God's grace and mercy towards sinners. In the sermon, it is highlighted that believers should also forgive others, allowing them to move forward without the burdens of past grievances. This reflects the profound understanding that we, too, have been forgiven completely for being sinners while simultaneously being clothed in the righteousness of Christ.