God is a just judge
from the post by Perennial Student:
Every church I have been part of since I was converted at age fourteen has clearly taught that justice means that God has to punish sin. We receive forgiveness only because the punishment we deserve was suffered by Jesus in our place.
This was a doctrine my mother hated. To her, that was the opposite of justice, for an innocent man to suffer in the place of the guilty, even if it was voluntary on his part. But she agreed that justice meant that people must bear the consequences of their mistakes. In this life, that meant one suffered the consequences of poor choices. After death, it meant reincarnation (or possibly transmigration) in order to continue working on problems left unresolved in the previous life.