It is possible to forgive a sinner repeatedly. But this requires more effort.
We next see “forgive” when the Pharaoh of Egypt asks Moses and Aaron to forgive him. Here, the Pharaoh wants them to forgive him so the plague of locusts can be taken away. So Pharaoh says, “Forgive my sin once more and pray to the Lord your God to take this deadly plague away from me” (Exodus 10:17). Again, we can infer this request is to “lift,” “carry,” or “take away” the sin of Pharaoh. Yet Pharaoh says, “forgive my sin once more.” Here, we see Pharaoh believes people can forgive him more than once. But if someone can forgive more than once, what does this mean? Well, it means to forgive can be repetitive. I can forgive one person repeatedly. But why is this important? It shows that when I forgive someone, I can forgive that same person again. It shows the chance for me to forgive someone more than once. To forgive repeatedly is possible. And since this is the case and we know forgiving requires effort, we can see that forgiving someone repeatedly takes more effort. That is to say, it takes more energy for a person to forgive someone more than once.