One always get to the point where you reach the final chapter in your life. Joseph had one such encounter when He had to reveal himself to his brothers. He played a vital roll in order for the Isrealites to be saved at the end but he needed to make sure of the intentions of his brothers. His brothers did not know his true identity and he played along up untill he could not do it anymore. He needed to get to the point where he had to reveal himself and came to the final chapter of his roll play.