When we are sinned against it is very easy to become bitter and angry, holding on to grudges for years on end. But this was not Joseph's heart toward his brothers as he revealed himself to them. Joseph grants so much grace and forgiveness for them. How is that possible for Joseph? Because he knows that the divine hand of God has behind him the entire time, bringing about good for him and his family. "And God sent me before you to preserve for you a remnant on earth, and to keep alive for you many survivors. So it was not you who sent me here, but God. He has made me a father to Pharaoh, and lord of all his house and ruler over all the land of Egypt." Genesis 45:7-8