I don't find anything scary about predestination as I understand it. Paul is speaking of the overall plan of salvation not the preselection of individuals. God predestined that we should have Christ as the way to be justified, saved and begin the process of sanctification. The plan began before time, was spoken of to Abraham, Isaac, Jacob, Moses, the kings and the prophets. I find it comforting that we find order and logic in His plan in the same way there is order and logic throughout creation. We don't know every minute detail, but we have a reasonably complete picture of the overall plan.