it was not you who sent me here, but God: This is the main message of Jacob's family story (37:2). As the Lord had told Abraham, he was bringing the Israelites into Egypt (15:13). God sent Joseph ahead to prepare a way to save his family during the famine.
This is a clear statement about God’s sovereignty (his complete rule and control over all things). Joseph explained that God was at work through all events and human actions to carry out his plan.
Because God is in control, people can forgive and be restored to those who have hurt them. If people do not believe that God rules over all, they may blame others and try to get even. But those who trust God believe that he is at work, even through human evil (see also Romans 8:28–30).