Joseph tells them to go home and tell their father that Joseph is alive and that he is in Egypt. The family will once again be together. At first Judah wanted to kill Joseph because their father favored him. Then Judah urged his brothers to sell Joseph instead. Judah not only wanted to harm his brother but profit from it as well.
Nobody gets it.
Nobody, that is, but Joseph. He watches his brother's, remembers his dreams, his father's dotage, Mrs. Potiphar, the dungeon. Suddenly the whole thing is clear. Now I understand that everything has to be just the way God had intended it all along. It's all been set up.