How do we know Christ is the propitiation for our sins?

The doctrine of propitiation is fundamental in understanding Christ's role in salvation. As cited in 1 John 2:2, we learn that Christ is the propitiation for our sins, meaning that by His sacrifice, He appeased God's righteous anger toward sin. Romans 3:25 reinforces this by detailing that God set Christ forth as a propitiation through faith in His blood to declare His righteousness. This demonstrates that God himself, in His infinite wisdom and love, provided the means necessary to reconcile us to Him through Christ. Thus, we see that salvation does not originate from our efforts, but rather from Christ fulfilling God's justice on our behalf.