9"Because the patriarchs were jealous of Joseph, they sold him as a slave into Egypt. But God was with him 10and rescued him from all his troubles. He gave Joseph wisdom and enabled him to gain the goodwill of Pharaoh king of Egypt; so he made him ruler over Egypt and all his palace.
11"Then a famine struck all Egypt and Canaan, bringing great suffering, and our fathers could not find food. 12When Jacob heard that there was grain in Egypt, he sent our fathers on their first visit. 13On their second visit, Joseph told his brothers who he was, and Pharaoh learned about Joseph's family. 14After this, Joseph sent for his father Jacob and his whole family, seventy-five in all. 15Then Jacob went down to Egypt, where he and our fathers died. 16Their bodies were brought back to Shechem and placed in the tomb that Abraham had bought from the sons of Hamor at Shechem for a certain sum of money.
Joseph had a real opportunity to repay the family that sold him into slavery. Did he punish them for doing this to him? No and in my opinion if he did, he would have been abusing the power granted to him by Pharaoh. He brought his family into his house and blessed them with food when they were starving.
This is how you know you have truly forgiven someone, when you can bless them in some way. Then you know that the act of forgiveness is not just lip service, but it shows that you have changed 100% towards the person who has offended you.