The every idea of “Sin” is missleading.
Evil(definition) – an action that brings harm to others, needs an equal recompensation to forgive
Sin(definition) – an action that brings harm to others(or your self), needs a few seconds of prayer(mumbling under your nose) to forgive
So “Sin” is basically an Invention of Cognitive Dissonance, to enable bad (and especially) good people to do evil things without burdening their consciousness
So they can “atone” for their evil actions to some Fantasy-Being not to those they have done harm to.
No wonder that the idea of Sin comes from the most evil and deprived people to ever walk this Planet