Sins sometimes are not ours
We can live destiny, we can live accordingly to our will or we can live justice. Destiny is prescribed scenario, written by God. There can be many scenarios and accordingly to our will we go by this or that scenario. Scenario can be the best (less sins) or the worst (many sins). And depending on what we choose we obtain justice. Justice can begin in the life or after it. Justice is always destiny, not our choice. Justice can be with prescribed sins to be convicted of sins to start hating sin.
Nothing happens in the World by chance. Some people have cerebral spastic infantile paralysis, some have uglyness, some people are sitting in wheel chair. It means that in previous lifes they commited heavy sins.
So sometimes sin is prescribed and thus it is not ours.