Know Before Doing
When you start to forgive someone for an injustice against you, what exactly is it you are and are not doing? This is perhaps the most fundamental issue–to define what we mean by forgiveness before practicing it.
Some would say, as Nietzsche did in the late 19th century, that you are engaging in weakness because only the weak forgive; the strong get even. Some would say that you are opening yourself to abuse as you go back into an unhealthy situation, but this confuses forgiveness and reconciliation. Some would say that you are moving on, even if this means that you are dismissing the person who was unfair to you. None of these captures the essence of forgiveness.
Forgiveness is goodness toward those who have been unfair to us, and this goodness can include the cessation of resentment, the offer of mercy and compassion and even love (which may take time to grow and require small steps in that direction). When people argue about forgiveness, most of the time they are arguing about what it means more than anything else. Know before doing.